Global warming
The major cause of global warming is the emission of green house gases like carbon dioxide, methane, nitrous oxide etc into the atmosphere. The major source of carbon dioxide is the power plants. These power plants emit large amounts of carbon dioxide produced from burning of fossil fuels for the purpose of electricity generation. About twenty percent of carbon dioxide emitted in the atmosphere comes from burning of gasoline in the engines of the vehicles.
Pledge
I had pledged to on the air conditional less often, because if you on the air conditional for some time, it would add up to the global warming.
http://www.globalwarming.org.in/ Pictures.