damage caused to water, air, etc. by harmful substances or waste
Pollution
the environment in which an animal or plant usually lives
natural habitat
there are a lot of ... ... sources such as wind and solar power
renewable energy
a gradual increase in world temperatures caused by gases such as carbon dioxide
global warming
a substance that is used to provide heat or power, usually by being burned
fossil fuel
a type of animal or plant that might stop existing because there are only a few of that type alive
endangered species
