19874

You state in this article that “an increase in the atmospheric concentration of carbon dioxide, not an increase in solar radiation” is responsible for current global warming. What is the scientific—not political—basis for that remark?

Warren Finley
Laguna Beach, Calif.

Increasing solar radiation doesn’t affect climate change? Doesn’t changing the thermostat change the temperature in a room?

Sean Walton
Orem, Utah.