As we all know, winter is the day when bears hibernate. However, for Russian bears, they ended their hibernation early in the winter of 2004, among other things.

This phenomenon shows that the temperature on the earth is getting higher and higher, because the content of carbon dioxide has soared in recent years, leading to the greenhouse effect and global warming. Therefore, in order to protect the environment on which human beings depend, we should take measures to prevent the greenhouse effect from being further strengthened. For example, humans should use less fossil fuels such as coal, oil and natural gas, and use more clean energy such as solar energy, wind energy and geothermal energy. Vigorously plant trees, prohibit deforestation and so on.

So the answer is: the temperature on the earth is getting higher and higher;

Measures taken: ① Intensify publicity, enhance environmental awareness, and make it clear that "there is only one earth for human beings!"

② Humans should reduce the use of fossil fuels such as coal, oil and natural gas and make more use of clean energy such as solar energy, wind energy and geothermal energy;

Vigorously plant trees, prohibit deforestation, and so on.