Archeologists working in the Tundra and Permafrost regions of Siberia and Alaska have found the frozen remains of Wooly Mammoths (elephants) with buttercup flowers still in their stomachs. Climate change is normal... and cyclical. The current crop of 'environmentalists' uses their 100 or 200 year trends as their reason to scare us all with their lies. However, let's take blocks of 20,000 year trends into account and it all begins to look as if this happens quite frequently in the past history of earth.
If they tell you that the camp fires from 'cave men' created the past global warming cycles - you can pretty much discount that one, as well.