It is related to current position of our world. Simply we can say that it is a reaction of the climate towards human’s worst actions.  We all have studied in our school that around the earth there is an ozone layer to protect us from the UV rays coming out from the sun. The ozone layer allows those rays, which are not harmful means, which are good for human health. However, as we human have discovered so many things and reached to a very good level. Those things help us but in same way, it harms us too. As Ac is the main cause for global warming. “Freon” is a very harmful gas which is used in Ac, Refrigerator, and other gadgets used for cooling. It cools the thing what we want to but it also depletes the ozone layer. In addition, harmful rays reach the earth and damage the skin. So skin cancer and brain cancer is a result of global warming. Himalaya is melting day by day. Icebergs are falling in the river and it increases the water level, which raises the chances of high tides. Even now-a-days temperature is also increased badly. Vegetation is also affected in a bad manner. No need to say that effects of global warming is more negative than positive.