the natural process by which the sun warms the surface of the Earth

behavior or products that do not harm the environment

all the organisations concerned with the protection of the environment

to reduce the amount of gases sent out into the air

The effect of global warming melting the polar ice caps and increasing the volume of water in Earth's oceans.

to try to solve the problems related to global warming

a steady decline in the total amount of ozone in the Earth's atmosphere

plants or animals that only exist in very small numbers, so that in future they may disappear forever

These are energy sources that can never disappear, like wind, hydro, and solar.

an area of land on which there are a lot of windmills or wind turbines for producing electricity

an ecological crisis a serious situation that occurs when the environment of a species or a population changes in a way that destabilizes its continued survival

to be able to reduce itself to nothing organically.