One Cause:

After we have looked at the general causes of the global warming, let’s now turn our attention to one significant cause which is the greenhouse gases. First of all, they contain carbon dioxide, water vapor, methane, nitrous oxide and chlorofluoro carbons and ozone. Those gases have the ability to hold and absorb the heat in the surface of the earth. Actually, it works as a mirror. To elaborate, when the heat from the sun comes to the earth, then it goes to the sky, but, unfortunately it collides with the greenhouse gases and goes back again to the earth. Also, we cannot ignore the fact that greenhouse gases are beneficial because they preventing the earth form becoming an ice planet. Finally the greenhouse gases has been increasing over the last 50 years.