mild
Low carbon, low carbon in English. This means lower greenhouse gas (mainly carbon dioxide) emissions. With the development of world industrial economy, the rapid increase of population, the unlimited rise of human desire and the uncontrolled production and lifestyle, the world climate is facing more and more serious problems, carbon dioxide emissions are increasing, the ozone layer of the earth is suffering from an unprecedented crisis, and global catastrophic climate changes appear frequently, which has seriously endangered the living environment and health and safety of human beings. Even the rapid growth or expansion of GDP that mankind once prided itself on is "greatly discounted" by environmental pollution and climate change (therefore, the country).
low-carbon economy
The so-called low-carbon economy refers to a form of economic development under the guidance of the concept of sustainable development, through technological innovation, institutional innovation, industrial transformation, new energy development and other means, as far as possible to reduce the consumption of high-carbon energy such as coal and oil, reduce greenhouse gas emissions, and achieve a win-win situation for economic and social development and ecological environment protection. To develop a low-carbon economy, on the one hand, we should actively undertake environmental protection responsibilities and meet the requirements of national energy conservation and consumption reduction indicators; On the other hand, it is to adjust the economic structure, improve the efficiency of energy utilization, develop emerging industries and build ecological civilization. This is a realistic way to abandon the previous development model of pollution first and then treatment, low-end first and high-end, extensive first and intensive first, and an inevitable choice to achieve a win-win situation for economic development and resource and environmental protection.
65438+2009 10 9 The Climate Committee of the European Parliament officially recognized that "animal husbandry causes global warming" and suggested reducing subsidies for animal husbandry to reduce methane. Many European parliamentarians clapped their hands, raised their hands and gave thumbs up to celebrate the passage of this bill! Swedish parliamentarian Jens? Homer: "The most influential thing you can do is to eat less meat, or not to eat meat at all."
Einstein: Vegetarianism is very auspicious for human beings. If the whole world is vegetarian, it can change the fate of mankind. If everyone is a vegetarian, we can immediately reduce global warming by 80%! Our earth home can be saved soon!
Car Free Day and Bus Week
According to the initiative of the Ministry of Construction, "China Urban Public Transport Week and No Traffic Week" is scheduled to be held from September 65438 to June 22 every year.
Car day activities. "
Calculation formula of "carbon" emission
According to experts' statistics, every time 1 kwh of electricity is saved, 0.4 kg of standard coal is saved correspondingly, and at the same time, 0.272 kg of carbon dust, 0.997 kg of carbon dioxide, 0.03 kg of sulfur dioxide and 0.0 1.5 kg of nitrogen oxides are reduced.
To this end, the following formula can be derived:
Saving 1 kwh = reducing emissions by 0.997 kg of "carbon dioxide";
Saving 1 kg standard coal = 2.493 kg "carbon dioxide" reduction.
(Note: The standard coal converted from the above electricity is equivalent, that is, the coefficient is 1 kWh =0.4 kg standard coal, while 1 kg raw coal =0.7 143 kg standard coal. )
In daily life, everyone can also contribute to energy conservation through their own behavior. The following is the basic formula for calculating carbon footprint:
Carbon dioxide emission of household electricity (kg) = power consumption × 0.785;
CO2 emission from driving (kg) = fuel consumption increase × 0.785;
Carbon dioxide emission of short-distance air travel (within 200 kilometers) = km × 0.275;
The carbon dioxide emission of midway air travel (200 km to 1000 km) = 55+0. 105× (km-200);
Carbon dioxide emission of long-distance air travel (1000 km or more) = km ×0. 139.
20 low-carbon lifestyles:
1, choose energy-saving air conditioner to save electricity every day.
2. Raise the air conditioner by one degree, saving electricity by 7%.
3. Turn on the energy-saving lamp, save electricity and see clearly.
4, the TV screen is darker, saving energy and protecting eyes.
5. Unplug the electrical appliance after use, which saves electricity and is safe.
6, scientific use of computers, good power saving effect. When the computer is not used temporarily, shorten the time setting for the monitor to enter the sleep mode; Remember to unplug the computer when you don't use it at all.
7. Clever use of refrigerator can save electricity. Defrost the refrigerator in time, try to reduce the number of opening doors, take out the food that needs to be thawed in the freezer in advance, and put it in the freezer to thaw.
8. Wash rice in advance, soak it for ten minutes, and then cook it in an electric cooker, which can greatly shorten the cooking time of rice and save electricity by about 10%.
9. Put a few bottles of water in the toilet to reduce the amount of water.
10, choose energy-saving washing machine, saving water and electricity is a miracle.
1 1. Adhere to paperless office, save energy and protect the environment, and use more instant means of transportation such as email and MSN, and less printers and fax machines.
12. Use solar water heater to save electricity and gas.
13, travel by public transport to reduce the burden on the earth.
14, more fuel-efficient driving: driving at a reasonable speed; Avoid cold start; Reduce idle time; Try to avoid sudden speed change; Choose the appropriate gear to avoid low-speed and high-speed driving; Use lubricating oil with the lowest viscosity; Change the oil regularly; Don't open the window when driving at high speed; The tire pressure should be appropriate.
15, go out and ride a bike, kill two birds with one stone for fitness and environmental protection.
16, buying less unnecessary clothes is a new fashion of environmental protection.
17, reduce the purchase of over-packaged goods.
18, driving less than one day a month, saving energy and fuel depends entirely on consciousness.
19, less disposable plastic bags, green shopping and energy saving.
20. Use less disposable wooden chopsticks to protect forests and reduce carbon emissions.
sustainable development
1972 The concept of "sustainable development" was formally discussed for the first time at the United Nations Symposium on Human Environment held in Stockholm. This seminar brought together representatives from industrialized countries and developing countries all over the world to determine the rights that human beings enjoy in creating a healthy and dynamic environment. Since then, countries have been trying to define the meaning of "sustainable development". At present, hundreds of definitions have been drawn up, covering international, regional, local and specific sectors, which is one of the basic requirements of Scientific Outlook on Development. 1980 IUCN's Outline of World Natural Resources Protection: "We must study the basic relationship between nature, society, ecology and economy and the process of utilizing natural resources to ensure the sustainable development of the world." 198 1 year, Lester R. Brown published "Building a Sustainable Society", proposing to realize sustainable development by controlling population growth, protecting resource base and developing renewable energy. 1987, the World Commission on Environment and Development published the report "Our Common Future", which defined sustainable development as "development that can meet the needs of contemporary people without endangering the ability of future generations to meet their needs." The idea of sustainable development is systematically expounded. 1In June 1992, the United Nations held the "Environment and Development Conference" in Rio de Janeiro, and adopted the Rio Declaration on Environment and Development and the 2 1 Century Agenda with sustainable development as the core. Subsequently, the government of China compiled the White Paper "Population, Resources, Environment and Development in China in the 2 1 Century", which incorporated the sustainable development strategy into the long-term planning of China's economic and social development for the first time. 1997 The 15th National Congress of the Communist Party of China identified the strategy of sustainable development as a strategy that must be implemented in China's modernization drive.
non-renewable resources
Including geological resources and semi-geological resources. The former, such as metallic minerals, nonmetallic minerals, nuclear fuels, fossil fuels, etc. There are often millions of years of metallogenic cycles; The latter, such as soil resources, although its formation cycle is shorter than that of mineral resources, it is also very slow compared with the consumption rate. We should make comprehensive use of this natural resource as much as possible, and pay attention to saving and avoiding waste and destruction. The cycle of this resource form is very long.
tidal energy
Tidal phenomenon is the periodic rise and fall of sea level caused by the change of lunar gravity, and the energy generated by the fluctuation of seawater and tidal current becomes tidal energy. Tidal energy is ocean energy in the form of potential energy, which refers to the potential energy and kinetic energy of water formed by seawater fluctuation. There is great energy in the tides of the ocean. In the process of high tide, the surging seawater has great kinetic energy, and with the increase of seawater level, the great kinetic energy of seawater is transformed into potential energy; In the process of low tide, the seawater is washed away, the water level gradually decreases, and the potential energy is converted into kinetic energy. The energy of tidal energy is directly proportional to tidal volume and tidal range. In other words, it is proportional to the square of tidal range and the area of reservoir. Compared with hydropower, the energy density of tidal energy is lower, which is equivalent to the level of micro-head power generation. The large tidal range in the world is about 13 ~ 15m, but generally speaking, the average tidal range above 3m has practical application value. Tidal energy varies from place to place. Different areas often have different tidal systems. They all get energy from deep-sea tidal waves, but they have their own characteristics. Landscape tides are very complicated, but they can be accurately predicted anywhere.
Climate warming
Climate warming refers to the phenomenon that the temperature of the earth's atmosphere and ocean rises in a period of time, mainly referring to the temperature rise caused by human factors. The reason is probably caused by excessive greenhouse gas emissions. People often say that global warming actually refers to global warming.
Climate warming is a "natural phenomenon". Because people burn fossil minerals to produce energy or cut down forests to burn, they produce various greenhouse gases such as carbon dioxide, and they also emit greenhouse gases such as freon through refrigerators and fire extinguishers. Because these greenhouse gases have high permeability to visible light radiated by the sun and high absorption to long-wave radiation reflected by the earth, this is commonly called "greenhouse effect", which leads to global warming. In the past 100 years, the global average temperature experienced two fluctuations: cold → warm → cold → warm, showing an overall upward trend. Since 1980s, the global temperature has obviously increased. The consequences of global warming will redistribute global precipitation, melt glaciers and frozen soil and raise sea level, which will not only endanger the balance of natural ecosystems, but also threaten human food supply and living environment.
What are the types of air pollution and what are their main characteristics?
Man-made pollution sources in the atmosphere mainly come from the development and utilization of energy (coal and oil). According to different types of energy, air pollution can be divided into three types: soot pollution, oil pollution and mixed pollution. In addition, there is non-energy pollution called special pollution. Soot pollution. Its main feature is the pollution caused by primary pollutants such as soot and sulfur dioxide discharged from coal combustion and secondary pollutants generated by chemical reactions of these pollutants. The air pollution in winter in northern cities of China is mainly soot pollution. 1952 The smog event in London, England is a typical soot pollution.
Oil pollution.
Its main pollutants come from petrochemical products, such as automobile exhaust, oil fields and petrochemical plants. The main primary pollutants are olefins, nitrogen dioxide, alkanes, alcohols and carbonyl compounds. These pollutants undergo photochemical reactions under the irradiation of sunlight, forming photochemical smog. The photochemical smog incident in Los Angeles, the "asthma incident" in Niigata, the "Oil City" and "Kuwait Asthma" in Kuwait, the oil producing areas, all belong to oil pollution.
mixed pollution
Including aerosols formed by oxides such as soot, dust and sulfur dioxide discharged from coal combustion as the main pollution sources; As a pollution source, pollutants mainly composed of olefins and nitrogen dioxide are discharged from petroleum. This kind of pollution, its response is more complicated. The oxidation rate of sulfur dioxide can be greatly improved by the oxidation of hydrogen peroxide and other oxides generated by the reaction of ozone with olefins.
special contamination
It is mainly produced by the waste gas discharged in the production process of the factory and the waste gas released by accidents, such as chlorine, fluoride, metal vapor or acid mist.
Pollutant discharge standard
The pollutant discharge standard is the limit set by the state on the concentration or total amount of pollutants discharged into the environment by man-made pollution sources. Its purpose is to achieve environmental quality standards or environmental goals by controlling the amount of pollutants discharged by pollution sources. According to the form of pollutants, pollutant discharge standards are divided into gaseous, liquid, solid and physical pollutants (such as noise) discharge standards. According to the scope of application, it is divided into comprehensive emission standards and industrial emission standards, which stipulate the allowable emission or concentration of pollutants that are ubiquitous or dangerous in a certain range (national or a certain region) and apply to various industries. The industry emission standard stipulates the allowable discharge or concentration of various pollutants discharged by an industry, which is only binding on the industry.
The United Nations Environment Programme announced that Rwanda will be the host country of World Environment Day this year.
201February 17, Kigali, Rwanda/Nairobi, Kenya-The United Nations Environment Programme announced today that Rwanda, an East African country that is in the process of transforming into a green economy, will be the host country of the global commemoration of World Environment Day in 20 10. World Environment Day, which is coordinated by the United Nations Environment Programme on June 5th every year, is a global festival to celebrate various active environmental protection activities. The theme of this year's World Environment Day is "Species Diversity, Only the Earth, Shared Future". This information reflects the important value of global species and ecosystems to human beings. At the same time, the theme of World Environment Day this year coincides with the United Nations International Year of Biodiversity.
Present situation of water resources utilization
China's total water resources are less than Brazil, Russian, Canadian, American and Indonesian, ranking sixth in the world. If measured by per capita water resources index, it only accounts for 1/4 of the world average, ranking behind 1 10. Water shortage is widespread in China, and it is getting more and more serious. There are about 670 cities in China, more than half of which are short of water to varying degrees. Among them, there are more than 1 10 that are seriously short of water.
People's Republic of China (PRC) wildlife protection law
(1988165438+10) The 7th meeting of the Standing Committee of the 4th NPC was revised according to the Decision on Revision of the 11th meeting of the 10th NPC Standing Committee on August 28th, 2004, in which Article 3 stipulates that wildlife resources belong to the state.
Eutrophication of water body
It refers to the phenomenon that under the influence of human activities, a large number of nutrients such as nitrogen and phosphorus needed by organisms enter slow-flowing waters such as lakes, estuaries and bays, which leads to the rapid reproduction of algae and other plankton, the decrease of dissolved oxygen in water, the deterioration of water quality and the massive death of fish and other organisms. Excessive phosphorus in water mainly comes from chemical fertilizers, agricultural wastes and municipal sewage. According to relevant data, the content of phosphate in surface water increased by 25 times in 15 years, and 60% of phosphate entering water in the United States came from urban sewage. The main source of phosphate in urban sewage is detergent, which not only causes eutrophication of water bodies, but also produces a lot of foam in many water bodies. On the one hand, excessive phosphorus in water comes from foreign industrial wastewater and domestic sewage. On the other hand, it has its endogenous function, that is, the sediments in the water will release phosphate in a reduced state, thus increasing the phosphorus content, especially in some eutrophic lakes caused by nitrate, which will be further complicated by the discharge of municipal sewage and make the system deteriorate rapidly. Even if phosphate is stopped, the problem will not be solved. This is because a large number of phosphate-rich sediments have been deposited on the bottom for many years, and these sediments usually do not participate in mixing because of the protective layer of insoluble iron salts. However, when the bottom water is in a reducing state due to low oxygen content (usually when it is stratified in summer), the protective layer disappears, resulting in the release of phosphate into the water.
Environmental complaint hotline system
With the process of industrial informatization and the general improvement of people's living standards, the pollution and damage to the environment are becoming more and more serious. Our government attaches great importance to environmental protection and has formulated a series of corresponding laws and regulations. In order to ensure the timely and effective reporting of environmental protection, prevent and put an end to prevarication, irresponsibility and retaliation against informants, and carry out scientific and standardized management and effective supervision of environmental protection reporting, it is necessary for the Environmental Protection Bureau to establish 12369 environmental complaint reporting hotline system by using contemporary information technology, especially the call center technology with computer CTI as the core.
Radionuclides exceed the standard.
Recently, due to the quality problem of ceramic tile sampling organized by AQSIQ, it has attracted attention from both inside and outside the industry, and triggered a discussion on whether radiation is radiation or not, and whether unqualified is excessive. Experts from China Indoor Environmental Monitoring Committee and National Indoor Environmental Quality Testing Center made the following explanations.
Researcher Huang Zihan, an expert in radon pollution prevention and control of China Indoor Environmental Monitoring Committee, believes that the radiation of ceramic tiles is also ionizing radiation that cannot be ignored. Radiation in nature can be divided into electromagnetic radiation and ionizing radiation. The radioactivity in decoration materials belongs to ionizing radiation, and the "radionuclide limit" of ceramic tile products on the market is unqualified, which means that the specific activity of natural radionuclides (radium -226, thorium -232 and potassium -40) in products does not meet the standard requirements stipulated by decoration materials. Radionuclides contained in decoration materials will emit three kinds of rays, α, β and γ, which will cause external irradiation to human body. At the same time, radium, a radionuclide, will also release radon, and radon and its daughters are also radioactive. Radon in indoor environment will be inhaled by people, which will produce internal radiation. Both internal irradiation and external irradiation may have an impact on human health, which can seriously damage the immune system and induce chronic radiation sickness such as leukemia and tumor. Radon pollution is regarded as the main control index in the national indoor air quality standard and the indoor environmental pollution control specification of civil construction projects.
Energy-saving lamp
Energy-saving lamps, also known as energy-saving bulbs, electronic bulbs, compact fluorescent lamps and integrated fluorescent lamps, refer to lighting equipment that combines fluorescent lamps and ballasts. The size of the energy-saving lamp is similar to that of the incandescent lamp, and the interface with the lamp holder is the same as that of the incandescent lamp, so the incandescent lamp can be directly replaced. The light efficiency of energy-saving lamps is much higher than incandescent lamps. Under the same lighting conditions, the former consumes much less electricity, so it is called energy-saving lamp.
Functional features:
1) wide working voltage: 170 V-250 V, suitable for China's power supply demand, long service life, average service life ≥8000 hours. No noise, no stroboscopic, no interference with communication and household appliances. It saves electricity by 80% compared with ordinary incandescent bulbs.
2) Using high-quality pure tricolor phosphor tubes, it has high light efficiency, small light attenuation, natural light, low power consumption and low heat generation, and the color temperature is 2700K and 6400K, which is the best choice for lighting sources.
three industrial wastes
"Three industrial wastes" refers to "waste water, waste residue and waste gas" discharged in industrial production.
The "three wastes" contain a variety of toxic and harmful substances. If it is not properly treated and discharged into the environment (air, water and soil), it will pollute the environment, destroy the ecological balance and natural resources, affect industrial and agricultural production and people's health, and produce new substances after physical and chemical changes of pollutants in the environment. Many are harmful to people's health. These substances enter people's bodies through different channels (respiratory tract, digestive tract, skin), some of which directly cause harm, while others have accumulation effect, which will more seriously endanger people's health. Different substances will have different effects.
Disposable chopstick
Disposable chopsticks are favored by the catering industry because of their sanitation and convenience, but the problem of a large number of forest land destruction caused by disposable wooden chopsticks is increasingly prominent. The consumption of all kinds of wooden chopsticks in China market is huge, including 45 billion pairs of disposable wooden chopsticks every year (about 65.438+66 million cubic meters of wood). Every 5,000 pairs of wooden disposable chopsticks consume a poplar that has been growing for 30 years. The production of disposable wooden chopsticks in China consumes more than 0/00 mu of forest every day, totaling 36,000 years in A Mu. Moreover, although disposable chopsticks are more convenient, they are not clean and only give people a sanitary illusion.
The intersection of love and hate and ozone
The protective effect of the ozone layer in the atmosphere on life on earth is now widely known-it absorbs most of the ultraviolet rays released by the sun and protects animals and plants from such rays. In order to make up for the increasingly thin ozone layer and even the hole in the ozone layer, people have tried their best, such as promoting the use of fluorine-free refrigerants and reducing the destruction of ozone by substances such as freon. The world has also set up an international day to protect the ozone layer. This gives people the impression that the more ozone you protect, the better. Actually, it's not. If there is too much ozone accumulated in the atmosphere, especially near the ground, the high ozone concentration will be a disaster for human beings.
Ozone is a strong oxidant with fishy smell. Its proportion is 1.66 times that of air, and it is often concentrated in the lower space of the office. Ozone is a silent killer! Ozone strongly stimulates human respiratory tract, causing sore throat, chest tightness and cough, bronchitis and emphysema; Ozone can cause people's neurotoxicity, dizziness, headache, vision loss and memory loss; Ozone can destroy vitamin E in human skin, leading to wrinkles and dark spots on human skin. Ozone can also destroy the immune function of human body, induce lymphocyte chromosome lesions, accelerate aging, and make pregnant women give birth to deformed children. During the operation of photocopiers, laser printers and engineering photocopiers, high-voltage static electricity and ultraviolet rays generate high-concentration ozone, and the organic waste gas generated by carbon powder heating is a strong carcinogen, which will cause various cancers and cardiovascular diseases. Therefore, people must attach great importance to the harm caused by ozone and organic waste gas.
photosynthesis
Photosynthesis, that is, light energy synthesis, is a biochemical process in which plants, algae and some bacteria use photosynthetic pigments to convert carbon dioxide (or hydrogen sulfide) and water into organic matter and release oxygen (or hydrogen) under the irradiation of visible light. Photosynthesis is the sum of a series of complex metabolic reactions, which is the basis of biological existence and an important medium of carbon and oxygen cycle on the earth.
waste plastics
Plastic waste, also known as "white pollution", is a major "public hazard" in the world today and has become an important factor threatening the ecological environment. Therefore, how to solve the problem of "white pollution" is a public issue that governments all over the world and people of insight from all walks of life attach great importance to. On June 1 2008, China implemented the "Plastic Restriction Order", prohibiting the use of ultra-thin plastic bags and providing plastic bags free of charge.
China uses 3 billion plastic bags every day, and the annual waste is more than 300 tons. The degradation needs 100~200 years.
synthetic pigment
Synthetic pigment is an organic pigment prepared by artificial chemical synthesis, which is mainly made of aniline dye separated from coal tar. 1856, the British Parkin synthesized the first artificial pigment-aniline violet. Since then, synthetic pigments have entered the historical stage and played a role in improving food color.
carcinogenic substance
Substances from natural and man-made environments can induce human and animal cancers under certain conditions.
Barbecue food, roast beef, roast duck, roast mutton, roast goose, roast pork, etc. Because it contains strong carcinogen 3,4-benzopyrene, it is not suitable for eating more.
Room stealth killer
1, hazards of indoor pollutants
In recent years, toxic pollutants harmful to health in indoor air have led to the morbidity and mortality of the global population. The reason is that the building materials used in new and rebuilt buildings contain harmful substances, and some even exceed the standard, which will cause air pollution in the indoor environment. Toxic air pollution occurs in people's daily work and living environment, which can cause pharyngolaryngitis, chest tightness, dizziness, decreased vision, blistering skin and so on. In severe cases, it will affect the human immune system, cause serious diseases such as hematological diseases, and even cause cancer.
2, the source of harmful substances
The main pollutants in indoor environment are radon, formaldehyde, ammonia, benzene and total volatile organic compounds (TVOC). In order to strengthen the prevention and control of indoor environmental pollution, we explored the sources of its pollutants. Mainly from the following aspects:
1. Organic solutions, such as paints, waterborne coatings and adhesives.
Second, building materials, such as wood-based panels, foam insulation materials, plastic plates and so on.
Three, blankets, tapestries and chemical fiber windows, etc.
Benzene mainly comes from paints, waterborne coatings and adhesives. Indoor radon mainly comes from wall and ceiling concrete and other building materials such as granite, brick sand, cement and gypsum. Formaldehyde mainly comes from wood-based panels such as plywood and blockboard. Ammonia mainly comes from high-alkali concrete expansion agent containing urea and concrete antifreeze.
Purify indoor air, plants show their talents.
Healthy living can be said to be one of the most concerned topics for modern urbanites. In recent years, people pay more and more attention to environmental pollution, especially formaldehyde pollution, to the extent that almost everyone talks about the color change of "formaldehyde"! So, is there a safe, effective and convenient way to purify indoor environmental pollution? In the high-rise building cast by reinforced concrete, it has become people's knowledge to choose exquisite and lovely green plants.
Four principles should be paid attention to when plants purify indoor environmental pollution:
1, select plants according to indoor environmental pollution. Some plants have strong purification and adsorption effects on some harmful substances, and if they are selected and cultivated indoors, they can play a certain auxiliary role in pollution control.
2. Choose plants according to indoor environmental pollution. The indoor environment is generally slightly polluted, and the pollution value is less than 1 times of the national standard. Using plants to purify can get better results.
3. Choose and place plants according to the different functions of the room. Plants breathe strongly at night and release carbon dioxide. Putting too many plants in the bedroom is not conducive to sleeping at night. Toilet, study, living room and kitchen are decorated with different materials and pollutants, so you can choose plants with different purification functions.
4. Choose and place plants according to the size of the room. The indoor environment of plant purification is directly related to the leaf surface area of plants, so the height of plants, the size of crown width and the size of green amount will affect the purification effect. Generally speaking, it is more appropriate to put two pots of plants with a height of 10 square meter in a room with a height of10 meter. So, how can we choose the one that suits us best? Today, I will introduce several plants that can effectively remove formaldehyde, and are economical, practical and beautiful!
Chlorophytum comosum
Features: easy to breed and strong adaptability. It is one of the most traditional hanging plants indoors. Its blade are slender and soft,
Small plants are drawn from the axils of leaves, drooping from the edge of pots, spreading like flowers and evergreen all the year round.
Efficacy: It can absorb more than 80% of indoor harmful gases, and its ability to absorb formaldehyde is super strong. Generally, l ~ 2 pots of chlorophytum are raised indoors, and the toxic gases in the air can be completely absorbed, so chlorophytum is also called "green purifier".
sansevieria
Features: The leaves are clustered, the flag leaves are just upright, and the surfaces around the leaves are milky white, light yellow and dark green, showing horizontal stripes. Common family potted varieties, drought-tolerant, like sunshine and warmth, but also tolerant to shade and avoid waterlogging.
Efficacy: It can absorb more than 80% of indoor harmful gases, and its ability to absorb formaldehyde is super strong.
Ivy League
Features: it is the most ideal indoor and outdoor vertical greening variety, evergreen vine, with soft branches and aerial roots, which can be attached to other objects. Leaves alternate, triangular and oval, and the demand for potted plants is increasing. It is a typical negative plant, which can grow in full light, grow well in warm and humid climate and is not cold-resistant.
Efficacy: It can decompose two harmful substances, namely formaldehyde in carpets, insulation materials and plywood and xylene hidden in wallpaper that is harmful to the kidneys.
aloe
Perennial evergreen succulent plant with short stem nodes, erect, thick leaves, juicy and lanceolate. I like warm and dry climate, and my cold tolerance and shade tolerance are not strong. It is not only a good hand at absorbing formaldehyde, but also has strong medicinal value, such as sterilization and beauty. Many potted plants have been developed, which have strong ornamental value and can be used to decorate rooms.
noise pollution
With the development of modern industry, environmental pollution has also come into being. Noise pollution is a kind of environmental pollution, which has become a great harm to human beings. Noise pollution, water pollution, air pollution and solid waste pollution are called the three major environmental problems in the world.
Physically speaking, noise is the sound produced when the sound source vibrates irregularly. From the perspective of environmental protection, all sounds that affect people's normal study, life and rest are called noise.
According to national standards, the noise in residential areas should not exceed 50 decibels during the day and should be lower than 45 decibels at night. If it exceeds this standard, it will be harmful to human body. So, what is the noise standard of indoor environment? The fourth paragraph of Article 5 of the National Method for Measuring Environmental Noise in Urban Areas stipulates that when measuring noise indoors, the indoor noise limit is lower than the standard value of the area where it is located, that is, 10dB. We often say that the noise pollution is 80dB.
Agricultural chemical pollution
Refers to the pollution of pesticides or their harmful metabolites and degradation products to the environment and organisms. After the application of pesticides, some of them are attached to plants or remain in plants, which pollutes grain, vegetables and fruits. The other part is scattered on the soil (sometimes directly applied to the soil) or evaporated and dissipated into the air, or flows into rivers and lakes with rainwater and farmland drainage, polluting water bodies and aquatic organisms. Pesticide residues in agricultural products pollute livestock products through feed. Pesticide residues pass through the atmosphere, water, soil and food, and finally enter the human body, causing various chronic or acute diseases. Pesticides that are easy to cause environmental pollution and harm are mainly those with stable properties, difficult to degrade and transform in the environment or organisms, and have certain toxicity, such as persistent pesticides with high residues such as DDT. Therefore, it has become an important subject to study and screen new pesticides with high efficiency, low toxicity, low residue and high selectivity (that is, non-broad spectrum).