Friday 3 October 2008


Introduction to Global warming
Global warming is a problem which has happened for several years. There are some causes of this problem which are man-made and some natural causes. In this essay I’m going to write about them.
Natural causes are causes created by nature. One is due to the emission artslike a greenhouse of methane gas from the tundra region. Methane is a greenhouse gas. A greenhouse gas is a gas that traps heat in the earth's atmosphere. Another cause is that the earth goes through a cycle of climate change which lasts around 40,000 years.
Man-made causes probably do the most harm. There are many man-made causes. Pollution is one of the biggest man-made problems. Pollution comes in many types. Burning fossil fuels is one thing that causes pollution. Fossil fuels are 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 naturally in 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 is the population. More people need more food, and more methods of transportation. That means more methane because there will be more burning of fossil fuels, and more agriculture. Agriculture is going to be damaged by Global Warming. Are you smell something terrible from a barn filled with animals? You're smelling methane. Another source of methane is manure. Because more food is needed we have to raise food. Animals like cows are a source of food which means more manure and methane. Another problem with the increasing population is transportation. More people means there are more cars, and more cars means more pollution. Also, many people have more than one car.
In my opinion Arctic and Antarctic will see reciting in a few years. So we must solve this problem for other generations.


http://library.thinkquest.org/J003411/causes.htm