a gas that causes the greenhouse effect, especially carbon dioxide
Greenhouse gases
Not now existing
Extinct
The mixture of gases around the earth
Atmosphere
Gradual increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space
Global warming
the general weather conditions usually found in a particular place
Climate
- fuels, such as gas, coal, and oil, that were formed underground from plant and animal remains millions of years ago
Fossil fuel