In such cities, polar bears approach vehicles actively, and the phenomenon of rummaging through garbage for food also appears frequently in some places. The reason why these animals can have such reckless behavior is that global warming has caused glaciers to melt and ice shelves to collapse in a large area, which has seriously damaged the living environment of polar bears.
With the decrease and disappearance of ice, it is more and more difficult for polar bears to find food sources, and they can't even find their own breeding habitat in the face of the expanding sea surface.
Similarly, the hidden crisis behind this appearance is gradually emerging. Glaciers melt and flow into the ocean, which not only makes a large number of creatures lose their homes, but also makes us human beings the next victims.
The sea level will continue to rise, and coastal and offshore cities around the world will face the danger of being submerged. After the melting of glaciers, the earth's water resources reserves will be greatly reduced, and the water resources problem will become more and more serious, which will make the already water-deficient and arid areas that rely on glacier snow water to irrigate agriculture worse.
What's more, due to climate warming, viruses and bacteria in frozen soil will be released, and almost all of these ancient viruses are stored in polar glaciers. If they are released with the melting of glaciers, it will be a catastrophe not only for human beings, but also for all living things in the world.
As for the problem of polar bears robbing garbage trucks, the local measure is to prohibit artificial feeding, because for safety reasons, on the one hand, if polar bears become dependent, they will come to cities and villages more frequently to look for food, and it is inevitable that any animal will be hurt.