the four questions to ask/answer about "global warming"

The four questions to ask/answer about global warming (GW):

1.) Is GW significant;

2.) Is the man-made portion significant;

3.) benefits/costs of GW; and

4.) benefits/costs of policy RX's. 

 

When you hear someone talking about the topic without addressing all four, you can know that you're dealing with a rube or a demagogue.