I haven't read the article, but I was just reading andrew Weills book "Eating Well for Optimal Health"- he has a section on this topic. He stated how cows produce as much pollution and damage the ozone as much as cars do- from the methane in their gas (referring to the mass amounts of cows raised for the beef industry)... as well as the destruction of the rain forest to create grazing space for cows... The author of "Diet for a Small Planet" also goes into how being vegetarian is beneficial to the enviroment.
I was raised a vegetarian... then went to eating meat when I was 18. I've never been a big meat eater, and most always ate meat from organic farms, free-range, etc. But lately I've realized how expensive it is, and how I don't really need it... and how I can help the enviroment by not eating meat. So, as of this week, I gave up meat... but I do think I will still be eating fish on occassion (the fish from the coop, that is organically farm raised).
Now, if I can only convince dh!
On another note- I also think that anyone who has consciousness about the worlds ecological state, and considers themselves an enviromentalist, would also eat as much organic food as they were able to ( I know financial reasons and availibility often can limit this), and they would also buy in bulk as often as possible- to help cut down on packaging.