a measure of the amount of carbon dioxide that is produced by the daily activities of a company or person

They're non-renewable energy sources like coal, gas, and oil.

all the organisations concerned with the protection of the environment

behavior or products that do not harm the environment

to try to solve the problems related to global warming

the process that occurs when a natural habitat, like a forest or wetland, is changed so dramatically by humans that plants and animals which live there.

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

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

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

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

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

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