Watched an interesting program the other night about how the earth has, and still does, cycle through climate change. Whatever happens to global warming it wont stop the next ice age when the northern hemisphere will gradually be covered by ice miles deep.
The cause is a coming together of three factors in the orbit and tilt of the earth around the Sun, these three factors next coincide in 50000 years time.
No renewable low carbon energy scheme is ever going to alter that, the climate is definitely changing for sure - just has it always has, but very little that man does is going to change things - the forces of nature are still king.