Global Warming

1) Causes- The causes of global warming are trapping the incoming and outgoing solar radiation by natural greenhouse gases in the layer closest to the Earth, the atmospheric layer. Pollution is also another cause because when we burn fossil fuels, this causes pollution and fossil fuels give off C02 gas. (http://library.thinkquest.org/J003411/causes.htm)



2) Facts- Some effects are the climate could change and there would be a big shift in major agricultural areas. An example is where the Wheat Belt in the U.S. could get less rain and turn warmer which would endanger their grain production. Food experts think that there will be a decrease in the world's grain by 2030. The U.S. and the Mediterranean region of Europe would turn warmer and drier which would make more watering and taking car of crops. The warmer areas would have a higher sea level and oceans will warm. Polar sheets of ice and mountain glaciers would melt. Little increases would endanger low-lying islands because they might flood.


3)Controversy - People are arguing about limiting greenhouse gases. The U.S., Japan, and Canada all agreed to a reduction of greenhouse gases below 1990 levels. Even though the U.S. agreed, they emitted the larges abount of greenhouse gas per year. People want to limit greenhouse gases because they are one of the number one causes of global warming.