How do i prove 2 my friend that global warming isnt real?

2012 is a lie. we can't predict the future. no one can and ever will. all we can do is guess.the human race has gone through hundreds of so-called apocalypses. when it turned 2000 that was suppose to be an Apocalypse but we are still here. but global warming is real. and tell your dad that he helped cause it. this summer was the first time the polar ice caps melted entirely ever. watch " An Inconvenient Truth" its a doentary about it.