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Global Warming
Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Global Warming is caused by manythings. The causes are split up into two groups, man-made or anthropogenic causes, and natural causes.
Natural causes are causes created by nature. One natural cause is a release of methane gas fromarctic tundra and wetlands. Another natural cause is that the earth goes through a cycle of climate change. This climate change usually lasts about 40,000 years.
Man-made causes probably do the mostdamage. There are many man-made causes. Pollution is one of the biggest man-made problems. Pollution comes in many shapes and sizes. Burning fossil fuels is one thing that causes pollution. Fossil fuelsare fuels made of organic matter such as coal, or oil. When fossil fuels are burned they give off a green house gas called CO2. Also mining coal and oil allows methane to escape. Methane is naturallyin the ground. When coal or oil is mined you have to dig up the earth a little. When you dig up the fossil fuels you dig up the methane as well. Another major man-made cause of Global Warming ispopulation. This means to methods of transportation because there is more methane because there will be more burning of fossil fuels, and more agriculture.
The greenhouse effect is the process by whichabsorption and emission of infrared radiation by gases in the atmosphere warm a planet's lower atmosphere and surface. The most important type of greenhouse effect is solar radiation.
Solar radiationat the frequencies of visible light largely passes through the atmosphere to warm the planetary surface, which then emits this energy at the lower frequencies of infrared thermal radiation. Infraredradiation is absorbed by greenhouse gases, which in turn re-radiate much of the energy to the surface and lower atmosphere. The mechanism is named after the effect of solar radiation passing through...