Conservation

System of relationships between living things and their environment.

• ecosystem

• extinction

• food chain

The gradual increase of air and sea temperatures caused by rising greenhouse gas levels.

• risk

• wildlife

• global warming

The area where a species naturally lives, eats, and reproduces.

• reforestation

• habitat

• wildlife

The loss of a species of animal, bird, plant, etc for all time.

• extinction

• fossil fuel

• recover

A person who cares about the natural world and makes efforts to protect.

• vulnerable

• environmentalist

• ecosystem

Formed from the fossils of plants or animals that died millions of years ago.

• greenhouse gas

• fossil fuel

• endangered species

A gas in the atmosphere that prevents heat from escaping into space.

• wildlife

• risk

• greenhouse gas

Likely to face injury or danger.

• vulnerable

• recover

• extinction

Measures to protect and restore the natural world.

• extinction

• conservation effort

• food chain

Forms of energy that can be replaced naturally.

• wildlife

• fossil fuel

• renewables