My thought is that the people who are arguing "man-made global warming" and the people who are arguing against it are so bothered by the other that they aren't seeing the bigger picture.
Copenhagen fails because of one logical fallacy. There are far too many people that believe that the only way to stop global warming is to change our lifestyles. Indeed, many believe the answer is to change American lifestyles specifically.
I disagree. Instead, we should BOTH be trying to find a common ground. I don't know what to think of global warming, and you know what - it doesn't matter. I do however know that pumping crap into the air, polluting the water and the soil, and destroying vast amounts of rainforest are all bad things. If we can all agree on that, let's try to find a way to fix it.
The answer isn't that we drive less or stop eating meat. The answer is to find a way to harness the innovative power of people to start a new business on clean, affordable, and renewable energy. There are environmental benefits, we can build a whole new economic engine in this country, and no more money or care for the Middle East! I am 100% for that! Sounds like a win, win, win situation!
Stop taxing us for doing what "we shouldn't be doing" and start rewarding us for what "we should be doing". I am OK with federal money being used to beef up technological programs at Universities so that we can train a generation of thinkers - kids who will have the next great idea that moves us away from fossil fuels and to better alternatives. Give them scholarships and student-loan forgiveness. Give tax credits to the auto manufacturers if they meet certain efficiency standards for their vehicles. But make those standards count for something. 30 MPG? No, no, no. How about 40% tax credit if half of the cars manufactured by a company get 60 MPG? 3 years tops and you'll see 60 MPG everywhere. 10 years and we could cut the automotive gas use in this country by half I bet. Better battery technology, power aware computing, and efficiency improvements in our electronics - all winners, all require innovation, and all could be big cash-cows on the world market.
It is time to forget about global warming and time to start thinking about renewable, cheap, and cleaner energy. Stop trying to frighten people and start trying to encourage them. If we play our cards right, it could be seen by our posterity as the most innovative grand-strategy ever conceived of by government. We could literally solve 3 major problems by focusing on a single goal.