How to think about global warming

Good people know that we need to do something to prevent global warming, right?

Some people care enough to dig up numbers and try to make informed judgments.  

Question: What percent of global warming is due to human activities?

Answer: We are responsible for about 0.28% of greenhouse gases.

This is one of the clearest and most articulate discussion of anthropogenic greenhouse gas emissions I have stumbled across.

http://www.geocraft.com/WVFossils/greenhouse_data.html