Bjorn Lomborg is a controversial environmentalist who argues against the status quo alarmist approach to global warming. Lomborg believes in man made global warming but he doesn’t believe in many of the mainstream predictions or accept carbon trading or other costly solutions. Through his organization the Copenhagen Consensus he brings scientist and thinkers together to suggest the most cost effective solutions to real world problems.
I am not as “certain” as Lomborg about man-made global warming. I am dubious that CO2 which is less than 1% of greenhouse gases is a significant factor in global warming. Agree with Lomborg or not he does bring much needed rationality and creative thinking to this issue. Watch his documentary or read his book. His Copenhagen Consensus is exactly what we need more of in the world.