[publius911]

If you look up all the men(7 total) involved in this study, you will see that they all have a long history of being deniers.

And if you choose snopes as a reliable authoritative source of Science facts, you have way too much time on your hands, are science deficient and need to choose new hobby.

I suggest collecting baseball cards.

[Ben Ficklin]

Nobody claimed that Snopes was an authority. Snopes identified and quoted their major source.

As for me being science deficient, I completed 31 hours of college chemistry and had a career in the industrial chemicals manufacturing sector. I actually worked as an analytical chemist and a product development chemist . I worked for the polluters, and know a lot about air pollution.

My first experience with air pollution regs was in the early 70s, before the clean air act took effect. Gov Reagan signed the California air pollution legislation in 1968.

I doubt that you attended college.