Soil pollutants can be roughly divided into inorganic pollutants and organic pollutants. When the soil contains too many harmful substances, which exceeds the self-purification ability of the soil, it will cause changes in the composition, structure and function of the soil, inhibit the activities of microorganisms, gradually accumulate harmful substances or their decomposition products in the soil through "soil → plants → human body", or be indirectly absorbed by human body through "soil → water → human body", which is harmful to human health.

1, the environment and human beings exist, and development and protection are synchronous.

2. Classified collection is everyone's responsibility, men, women and children.

Fresh air and elegant environment are what we enjoy, and everyone should do their part to protect the environment.

4. The earth is my home, everyone loves it, and everyone does something to benefit thousands of families.

5. Life comes from nature and health comes from environmental protection.

6. Save the Earth, Qi Xin works together.

7. Limited resources and infinite cycles.