category, a group of things that share common features, circular, shaped like a circle, cover, to place something over or on top of something else, depressing, causing sadness or gloom, discover, to find something for the first time, equator, an imaginary line around the earth that divides it into equal north and south parts, generally, in most cases; usually, opposite, completely different; facing or on the other side, wildlife, animals and plants that live in their natural environment, cut down, to reduce or fell something, especially trees, depend on, to rely on someone or something for support or survival, fossil fuel, natural fuels, such as coal, oil, and gas formed from the remains of plants and animals, global warming, the gradual increase in the earth’s temperature due to human activities, look after, to take care of or protect someone or something, pay attention to, to focus on or carefully observe something.

Leaderboard

Visual style

Options

Switch template

)
Continue editing: ?