Definition

Global warming is the rise in the global average surface temperature resulting from the improvement of the greenhouse effect. This improvement is polluting the air. Gases that been created form factories that controlled by humans especially carbon dioxide. Another definition is the element created by burning fossil fuel and wood. There are some evidences about this phenomena that I will talk about them in the next part of this section.

The big pieces of ice started to melt from the top of mountains and that is happen all over the world such as in Europe, Alaska and Mount Kilimanjaro. The courses of this melting is related to the changes of the percentage of rainfall resulting from the increase of the temperature which we called it the global warming.

you can see thebig difference between the two pictures which have been taken by NASA in
1993-2000.

In 2004 they started to make a study in Russia about the temperature and they found that the average temperature in Siberia around 6000 years ago heated up by 3 to 9 degrees Celsius in the winter and by 2 to 6 degrees Celsius in the summer. One of the important evidence is the increase of carbon dioxide which caused by burning fossil fuel, So the scientists discovered that the increasing of this element will also increase the temperature all over the world.

you can notice the rapid increase of carbon dioxide every year