[KarlInOhio]

when global warming caused by increased solar activity in the 20th century reached its peak

No, no, no, global warming is caused by man made CO₂. The UN told me so. And if you can't believe the UN who can you believe? < /mother of all sarcasm>

[conservative physics]

I guess no one told this guy that the temperature of the Earth has been exactly as it is now since the beginning of time, and only recently started to change because people in America started driving SUV's.

*rolls eyes*