I believe in climate change. The climate has been changing since the earth was formed.

Just 11,000 years ago, most of North America was covered by a 2 mile thick ice and snow sheet.

I believe that if Al Gore was alive back then, he would have popped his head out of his ice cave, noted the receding glaciers,
and would have said: "This is a real problem. We have to do something about this."

The Coming Ice Age - 1978 - YouTube