I understand the whole Theory vs. Fact debate, but there is many things I don't need to know for fact to believe they are true, eating certain things to know what they are, if it smells and looks like it, it is. Facts are, ice shelves are melting, creating more black water, which abosrbs the Suns rays, creating temperatures in the oceans to rise, making ice melt faster. The Green House effect is widely disputed, but there seems to be good evidence there something going on with, turn on the news, there are a lot more weird, wacky weather crap happening, things climate wise are definitely changing.