@stanislawp - The climate changes. You don't need scientists to realize that. Just look at historical crop records. Massive crop failures throughout the world in 536 possibly caused by a volcanic winter, judging from East Asian records. During the "Medieval Warm Period", you could grow grapes in England. Then came "The Little Ice Age" and we see a shift to crops that were heartier in Western and Northern Europe. Interestingly enough, those two periods were exclusive to the Northern Atlantic. Scientists don't know why. But the farmers that lived through them will tell you it happened.

The Green Movement is a total scam, though. Hands down.