Do extensive historical research on this planets cyclical weather patterns that have more to do with the temperature fluctuation and radiation output of our sun than mankinds industialization.
It's easy to side with this man made global warming theory with all of emotional please of some scientists, actors , media and politicians vying for votes but there should be serious debate and challenge on this theory that is now accepted as fact.
There is more than one side to this and real science should be able to withstand the harsh light of scrutiny.
http://www.junkscience.com/