Increase in average temperature of the earth surface due to Green House Effect is called Global Warming. Increasing global temperature is expected to cause sea levels to raise an increase in the intensity of extreme weather events and significant changes to the amount and pattern of precipitation, likely leading to an expanse of tropical areas and increased pace of desertification. Other expected effects of global warming include changes in agricultural yields, modification of trade routes, glacier retreat, mass species extinctions and increases in the ranges of disease vectors. Electricity should be conserved, vehicles should not be used for shorter distances, awareness should be created, trees should be green or else grown trees should not be cut.