Just a comment on the spectrum of reactions to global warming. As far as I've observed, few people now deny that there is such a phenomenon. The differences come in what people believe are the causes, and in their reactions to the same.
Most people I know believe that man is the primary cause of global warming, through deforestation, industrial and transportation pollution. These people feel that immediate action to change these actions is imperative, in order to reverse the global warming trend, if possible. They exhibit anxiety but not inconsiderable hope for the future.
The other camp - far fewer in my experience, but composed largely of politicians - consists of people who believe that the global warming we are observing is part of a natural cycle that would occur regardless of mankind's puny contribution. They believe that the next ice age will arrive in our lifetimes (anywhere from 20 - 50 years from now) regardless of what little effect we humans could make, and feel that taking action to reduce emissions and the like is pointless. They exhibit surprisingly little anxiety and no hope. I don't know many of these personally, but I suspect that most if not all of them are looking into buying property in the tropic or sub-tropic zones in the next few years.
There are convincing scientific data to support both camps. So, in which camp are you?