GHG

In the climate debates, I hear it all the time: why should the US do anything when China and India are the fastest growing and largest emitters of greenhouse gases on the planet? Though I make it a personal policy to never discussion mitigation policies with characters who will not even accept the reality of the problem, the question does, on its own merits, deserve a thoughtful answer. Clearly, climate disruption due to accumulating greenhouse gases is a global problem and requires a cooperative and global solution. We all share the same planetary atmosphere, and CO2 is a well mixed gas in…

This is just one of dozens of responses to common climate change denial arguments, which can all be found at How to Talk to a Climate Sceptic. Objection: Climate scientists never talk about water vapor, which is the strongest greenhouse gas, because it undermines their CO2 theory. Answer: There is no climate model or climate textbook that does not discuss the role water vapor plays in the Greenhouse Effect. It is the strongest Greenhouse gas, contributing 36% - 66% to the overall effect for vapor alone, 66% to 85% when you include clouds. It is however, not considered as a climate "forcing…