[BillT]

CO2 that is due to man’s use of fossil fuels is about 3%.

3% since when, yesterday, last year, 1,000,000 years ago?

It does make a difference you know.

[TN4Liberty]

3% since when, yesterday, last year, 1,000,000 years ago?

Reread it. Man causes 3 percent of the CO2 in the air. No timeframe required.

Not saying it is right or wrong, just that the logic in the statement exists.