Or simply posing the following to them:
1. Define the correct temperature range for the planet.
2. Define the correct humidity range for the planet.
3. Define the correct mean sea level for the planet
4. Define the correct amount of precipitation for the planet.
5. Define the correct makeup of the atmosphere.
6. Define the correct amount of sea ice at the N/S poles.
7. Define/explain past glaciation and subsequent warming without any input from humans.
rktman, I am guessing you are either a rocket scientist or tennis player. Based on the questions you proposed, I am leaning towards the former ;).
Good questions, all. I like to use the Coleman presentation because he carries so much credibility.
V/R
Bill