Why use Gore's film as a reference? Because he won the Nobel. And that means to engage the culture on this issue, we need to be conversant with what they've seen. I recommend watching "An Inconvenient Truth" for the same reason I'd recommend reading The Origin of Species to those who plan to egage with scientists who believe in evolution. Please don't confuse my recommendation with an endorsement. 

And speaking of Mr. Gore, may I encourage you to refrain from calling him an idiot? Our Lord had strong words for the one who calls another human made in His image "a fool." (See Matthew 5:22.)  Surely you can find a better  way to express your strong negative feelings.