Pollution and Wastes

What are the greenhouse gases?

Scientists recognize carbon dioxide (CO2), methane (CH4), chlorofluorocarbons (CFCs), nitrous oxide (N20), and water vapor as significant greenhouse gases. Greenhouse gases account for less than one percent of Earth’s atmosphere. These gases trap heat in Earth’s atmosphere, preventing the heat from escaping back into space. Human activities, such as using gasoline in automobiles for fuel, account for the release of carbon dioxide and nitrogen oxides.

* HFCs = hydrofluorocarbons, PFCs = perfluorocarbons, SF6 = sulfur hexafluoride.


This is a web preview of the "The Handy Science Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App