Discuss causes and effects of global warming. What measure need to be taken to control global warming?

Causes of global warming are the release of an excess of carbon dioxide, methane (CH4), surface ozone, nitrous oxide, and chlorofluorocarbons (CFCs) through human activities like burning carbon-containing fossil fuels,land conversion, use of CFCs released appliances etc. These greenhouse gases absorb infrared radiations which in turn slow down the escape of heat back to space and warming of the atmosphere. Effect of global warming includes changes in sea level, changes in precipitation patterns, disturbed nutrient cycling, effects of changes in climatic conditions on organisms, including humans; and effects on agriculture. Measures include Reduced the use of fossil fuels, Use of eco-friendly energy efficient fuels, use of renewable source of energy and reforestation.