Evidence I have seen regarding Global Warming:
1) It's happening, period.
2) Likely catalyst of Global Warming is the sun and solar cycle activities and we happen to be in one.
3) Man may indeed have accelerated the process, but we should be more concerned about increased cancer from pollution we breathe in and stopping carbon emmissions from that stand point.
4) Global warming will harm the economy, but as far as man is concerned over the long-haul, a warmer planet spurs population growth of all species.
I am concerned that man is even fathoming methods to prevent the next global warming cycle now. We are just learning how the patterns of global warming, weather and our solar system all inter-relate. We are hundreds of years away from being morally and technical advanced as a species to even attempt to disupt a process that has occurred for 2 billion years.
I didn't know that CO2 cause cancer. My god I'll get cancer because I exhale CO2. I got to stop breathing.