From NASA yesterday:
Since the 1890s, surface temperatures have risen faster in the Arctic than in other regions of the world. In part, these rapid changes could be due to changes in aerosol levels. Clean air regulations passed in the 1970s, for example, have likely accelerated warming by diminishing the cooling effect of sulfates.
You can read all the details at the link, but basically all those aerosol products that the left DEMANDED that we stop producing in the 70s, are now likely the cause of increased temperatures in the arctic. Another in a long line of liberal unintended consequences such as more malaria after DDT was demonized and excessive water use by forced conversion to "low flow" toilets.
It should be obvious to those paying attention that "global warming," or climate change, is the least understood field in science. There are so many conflicting reports and assumptions that any actions taken by governments to stop "global warming" are futile at best and economically devastating at worst. This does not mean that anyone advocates polluting the planet. Commonsense actions to reduce pollution can be undertaken without destroying the economy or industry, and without the help of massive government regulations.
Big Al needs to fold up his "cap and trade" play set and go home. The greatest scam the world has ever known is rapidly falling apart.