A few "old timers" have asked me an interesting question.
Vice-President Al Gore has stated that the earths temperature hasn't been this warm in 400 years. The "old timers" want to know what caused the earth to be this warm 400 years ago? After all there was little or no use of fossil fuels used back then. No internal combustion engines. No airplanes. Hmm. Space rockets?
Sincerely, Tom