1. Chargeable battery by electrical and solar car - no air pollution
2. The factories should not waste the carbon which comes out through their chimney as black smoke.
3. The factories should not waste the hot chemical water, they should supply those water to the thermal plant.
4. We, the humans, should also do some primitive activities for the nature, we should not throw non-biodegradable things at anywhere carelessly, instead we should throw those garbage in the dustbins only.
These are the points which I could share with for now......