That is the problem, there is no real proof at this time and many scientists feel we are in a normal cycle and much of it is caused by sun activity. Acutally, in some areas, there has been an increase to the ice packs over the past couple of years. It is wrong to be putting things forward as fact, like some are doign right now. We need to find out for sure, not in theory.
That being said, we should still be looking to take better care of our planet and looking for clean and renewable sources, if for not other reason, to improve our economy.
"Always look on the bright side of life!"
Eric Idle