The main source of environmental pollution in the air

1. Waste, waste gas, waste water, waste residue and noise discharged from the factory;

2. people in the discharge of waste smoke, waste gas, noise, dirty water, garbage;

3. Exhaust and noise emitted by means of transport (all fuel vehicles, ships, aircraft, etc.);

4. extensive use of chemical fertilizers, pesticides, herbicides and other chemical substances after irrigation out of the farmland water.

5. Mine wastewater, waste residue.

The main pollutants in the air are sulfur dioxide, nitrogen oxides, particulate contaminants, acid rain.