Good response and good points brought up; especially the 30 years of technological advances. One things I do have to say, is that I am fairly confident, that no matter what is causing the world to currently heat up, that scientist in the next 30 years will find something to reverse the effects of global warming drastically. How? I don't know. But I am sure they are currently working on it, and technology only continues to get better.
Right now I drive something that gets around 12mpg, if I could get the same power/comfort/size for the same price I currently paid, I would. But until prices come down and they make trucks/suv's that still have good power and mpg, I will stick with my truck, not a hybrid.
Also, If anyone has been reading info on Dubai, they are going to be the first "all green" city. They are plans to get rid of all cars and travel. Plan trees everywhere and get rid of fossil fuel use completely. This is all despite the million of gallons of oil currently in reserve in Dubai, surrounded by oil dominant countries. If I were to invest a lot of money, I would invest it in Dubai... but that's another whole discussion.