Trimming the amount of meat Americans eat would not only help the planet -- a mere 20 percent reduction is the equivalent of switching from a Camry to a Prius.
That is from The High Price of Beef in Sunday's NY Times Magazine. By this measure, I have had a couple of Priuses in my garage since the late 1980s, when I reduced my beef consumption in half. I initially did this because the quality of beef was poor in Jakarta, where I lived for five years.
Around that time, a lot of research came out about the health effects of eating too much red meat, so when I returned to the US, I kept my red meat consumption low. I didn't eliminate meat altogether (I like it too much), but I swapped quantity for quality - eating good cuts of meat fewer times per week.
More recently, I have begun eating mostly organic beef, again primarily for health reasons. I pay more for it, but eat even less of it. So my wallet wins, my health wins, and the global climate wins.
And I can tell my friends that I have not only one, but two Priuses.