The water body on the earth refers to the sum of all forms of water on the earth's surface, including oceans, lakes, rivers, glaciers, clouds and so on. Water is one of the most important resources on earth, which can nourish life, maintain ecosystem, regulate climate and promote economic development.

With the continuous development of human society and the acceleration of industrialization and urbanization, water resources are facing severe challenges and water pollution is serious. Problems such as water shortage, water quality deterioration and ecosystem degradation caused by pollution and over-exploitation have become major issues of global environmental protection and sustainable development.

Protecting the water bodies on the earth is the responsibility of each of us. We should reduce water consumption as much as possible, strengthen water-saving awareness, and at the same time use and protect water resources in a scientific and sustainable way. Only through the joint efforts of the whole society can we protect the water resources on the earth and ensure that we and our descendants have sufficient and clean water resources.