I've listened to both sides of it, and to be honest I'm not convinced. Understand I'm also a guy who has in the past invoked environmental issues as a reason for needing to greatly reduce the human population and keep it at a lower level, based on resource depletion and the like. If I believed there was something here I'd say so, as there are a lot of issues I go across party lines for. As a general rule "global warming" seems to be a political construct that has been used as an excuse by the left wing to attack businesses that it does not like, many of which are supporters of political rivals. As a result it's gotten bursts of positive attention from people who hate those businesses, or otherwise go along with that side of the political debate, but without any real truth or evidence behind it, it's lost
a lot of inertia. It hasn't exactly turned a lot of people against the left wing, but it's no longer a rallying cry, or something that is going to bring undecided over the fence until something concrete materializes. There is no evidence that what we're seeing has anything to do with humanity at all, and frankly there have been just as many competing theories that are just as valid for the few things that have been noticed. Larry Niven for example wrote a book called "Fallen Angels" which mocked the entire idea, and was based on actual science that counters global warming (he made a lot of points about this in his afterwards). I won't get into that entire thing because I have no idea how true any of that is either, but the point is there is just as many scientists argueing against this entire thing as there are for it... at the end of the day nobody can really prove anything or tie humanity to it, and what side is embraced largely comes down to political agendas.
Right now I'd imagine the big concern is that a lot of big votes are about to happen, and despite how the media spins things the Republican party isn't close to "Dead" or "dying" any more than the Democrats were during their last downward slump. Outside of rhetoric the guys at the top know all the BS about scared old men dying out, is just that. Right now one of the big things the left wing wants to push for is alternative energy, which is a noble goal, but rather than developing it and slowly building an infrastructure it wants to drive other energy businesses out. One rallying cry towards this end has been "global warming" which is no longer working at a time when the left most needs the rallying point. A recent "environmental bill" based heavily on global warming bunk was recently shot down because one thing it did was attack coal fired power plants. The coal industry being one of the big things a lot of states like Kentucky heavily rely on, with few other alternatives. Even if the jobs in "alternative energy" such a bill created materialized it wouldn't help the people put out of work, or magically create that infrastructure in the states that rely on things like coal mining, or retrain the population for that matter. The general consensus among liberals who support it (looking at sites like "Huffington Post") is that somehow the workers hurt by this will be magically taken care of, or that opportunities will suddenly appear for them, or in many cases what seems to be a rather disturbing attitude that "who cares what happens in the flyover states". You read the responses and you sort of see the problem. Ideas like this previously being stronger because a lot of moderates could be brought in by saying "we need to do this in order to save the planet because we're all doomed" but people aren't buying it anymore. At the end of the day the people in a lot of these states and their reps provide strong basic opposition, and of course there is the whole issue of the working class as a whole not liking the willingness of the government to strike down entire industries (no matter which ones) without there being alternatives already present for those that rely on them, especially in this economy. While the left still has a lot of support among the working class, for things like this it can lose that support and has needed other things like environmental scares to help push their agenda. At the end of the day though it all comes down to kickbacks though, and the bottom line is that a lot of liberals are heavily invested in alternative energy and have a lot to gain from it's success (financially) while of course the right wing has a similar relationship with the established industries and the people in it benefit directly from their continued dominance. At the end of the day it's all slap fighting over money and personal power. The left wing doesn't really care about the environment (which is why they spout bunk about it) and the right wing doesn't really care about the working man, but your typical person still has to pick sides based on what they feel will hurt them the least.
All this rambling aside, my basic attitude is that what they need to be doing is actually establishing this alternative energy infrastructure, and spend the next decade or three actually building the plants and such in the states like Kentucky connected to the old forms of energy trade, so the people that lose jobs will be able to move into other ones. That's not generally how things are happening though. I personally am all for alternative energy, but in this crappy economy we can't decimate what industries we still have that people rely on. What's more I also feel that before we seriously innovate, test, and implement anything, never mind build plants and such to manufacture it, we should be damn sure we can control the technology and profit from it. That means taking strong action against nations like China, including military action, to protect our IPs. There was some big thing on TV not long ago about how Chinese hackers connected to their government stole solar power technology from US businesses which has had a crippling effect economically and on the development of these technologies. The response by the government was to have the FBI issue warrants for the arrest of Chinese officials, which they promptly ignored, while predictably laughing at us (like usual), never mind erasing the technology/halting production and development and paying damages...