Pollution

1. water pollution

1.1. ships

1.2. improper waste disposal

2. air pollution

2.1. factories

2.2. fire

2.3. cars

3. land pollution

3.1. garbage

3.2. deforestation

4. reducing pollution

4.1. reusing

4.2. recycling

5. soil pollution

5.1. domestic and urban waste

5.2. soil erosion

5.3. industrial and mining waste

6. noise pollution

6.1. transport

6.2. industrial

6.3. fire works

7. radiation

7.1. building materials

7.2. natural sources

7.3. industrial sources

7.4. atomic bomb tests

7.5. domestic sources