1. Acid rain: Acid rain is acidic precipitation with pH less than 5.6 caused by acidic pollutants such as sulfur dioxide (SO2) and nitrogen oxides in the air. A series of serious environmental problems, such as acidification of soil and lakes, destruction of vegetation and ecosystem, corrosion of building materials, metal structures and cultural relics, have appeared in areas endangered by acid rain.

2. Toxic chemical pollution: There are about 70,000 to 80,000 kinds of chemicals in the toxic chemical pollution market. About 35,000 species are harmful to human health and ecological environment. Among them, about 500 species have carcinogenic, teratogenic and mutagenic effects. With the development of industrial and agricultural production, 1000 ~ 2000 kinds of new compounds are put into the market every year. Due to the extensive use of chemicals, the atmosphere, water, soil and even living things in the world have been polluted and poisoned to varying degrees, and even penguins in Antarctica have not been spared.

3. Global Warming Global Warming: Global Warming means that the main reason for global warming caused by rising global temperature is that human beings have used a lot of fossil fuels (such as coal and oil) and emitted a lot of greenhouse gases such as carbon dioxide in the past century.

4, the sharp reduction of forests:

The sharp decline of forests is an important part of the ecosystem on which human beings depend. There used to be 7.6 billion hectares of forest on the earth, but it has been reduced to 5.5 billion hectares in this century and to 2.8 billion hectares in 1976.

The harm of destroying natural resources at will lies in:

1, excessive pumping of groundwater leads to land subsidence;

2. Overgrazing and land reclamation lead to land desertification;

3. Deforestation will also lead to land desertification;

4. Overfishing will lead to a sharp decline in the number of fish;

5. Crazy killing of wild animals will make animals extinct;

6. The emission of harmful gases makes the global climate warm, the polar icebergs melt, the sea level rises, and coastal cities and countries are in danger of being submerged.