Harrison Schmitt doesn’t believe that humans are causing global warming. “I don’t think the human effect is significant compared to the natural effect,” said Schmitt.
Former astronaut speaks out on global warming
Imagine There’s No Global Warming
On the other side John P. Holdren, President Obama’s choice to advise him on matters of science policy says “Climate change is real, it is accelerating, it is caused in substantial part by human activity, it is dangerous and it is getting more so,”
Climate Change by Frank Morring Jr. for Aviation Week.
This should get interesting. I propose we act as if we are causing it while we figure out if we are.