1. 1) water pollution
2) noise pollution
3) air pollution
4) land pollution
2. 1) water pollution
3) land pollution
4) air pollution
water pollution
noise pollution
air pollution
land pollution
1. 1) water pollution
2) noise pollution
3) air pollution
4) land pollution
2. 1) water pollution
2) noise pollution
3) land pollution
4) air pollution
water pollution
noise pollution
air pollution
land pollution