Greenhouses gases, such as carbon dioxide, are gases in the earth's atmosphere that trap thermal energy and contribute to the greenhouse effect. The greenhouse effect is a natural phenomenon where gases in the earth‚Äôs atmosphere trap warmth, almost like a blanket. Although a certain amount of greenhouse gases are a natural part of our environment, indeed they keep us alive, too much makes the blanket so thick that the earth‚Äôs temperature rises. This is known as global warming.
The most common greenhouse gases are carbon dioxide, methane, water vapour, nitrous oxide, and hydroflourocarbons, perflourocarbons, and sulphur hexafluoride.