1
The cutting down of trees in a large area, or the destruction of forests by people.
2
Catching too many fish in an area of the sea, so that there are not many fish left there.
3
A sudden violent movement of the Earth's surface.
4
Damage caused to water or air by harmful substances or waste.
5
A large amount of water covering an area that is usually dry.
6
State of burning that produces flames and send out heat and light, and might produce smoke.
