The Forest Buddies |
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Save The Forests, Save Our Lives |
| Global warming |
| Greenhouse gases Four layers of gas make up the atmosphere. The atmosphere supports life on earth and protects us from the ultra-violet rays. Heat from the sun is absorbed in the atmosphere and water is recycled here. The troposphere is the first layer of the atmosphere. The stratosphere, which is the layer above the troposphere, contains the ozone layer that absorbs the ultra-violet radiation from the sun. Most of the energy on Earth is from short-wave radiation that converts light to heat energy to warm the Earth. This heat is trapped by the gases in the atmosphere. This greenhouse effect keeps us warm. An excess of greenhouse gases, such as carbon dioxide and methane, can cause global warming. Deforestation is a persistent contributor to this. When trees are cut down or burnt, a lot of carbon dioxide will be released. As such, we face a dilemma when trees are cut down for our needs. |
Sources: Shelley Canright. (December 9, 2007). NASA - Earth's Atmosphere. Retrieved: December 10, 2007. from NASA. Website: http://www.nasa.gov/audience/forstudents/9-12/features/912_liftoff_atm.html Next
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