On 13 Feb 2006 07:48:29 -0800, "carneyke"
wrote:

Grahm,
Hot is hot, no matter how you "analyze" it. Today's cars generate much
more heat and there is many more cars than 30 years ago. No science
involved Sherlock, just plain old common sense, I was blessed with and
you.........

In about a minute of googling a couple of numbers, and without even
using a calculator, you can compute the approximate amount of heat
dumped by all the cars in the usa, expressed relative to the net solar
heat influx. That calculation will hint at the utility of "No science
involved, just common sense."

John