After last summer and this past winter I thought we hit the tipping point in global warming. However, I am a lot more optimistic now as I expected temps in the 90's by now where I live. With the exception of 2 mini heat waves this spring, It's been relatively cool. This gives me hope. The naysayers will undoubdedly use this as "proof" that the earth isn't warming which is scary, and at this point they're grasping at straws. Any number of experiments can prove what the effects of increased carbon levels and decreased ice cap size can do. Either way this is still good news. Hopefully technology will catch up to the need for something as efficient and convenient as gas without the negative effects. It seems we just might have more time than I thought.