“*If every American ate just one meat-free meal per week, the emissions **savings would be the same as taking more than 5 million cars off our **roads*” – http://is.gd/d3BdM

Unfortunately the article above doesn’t say over what time period, but

I assume over the lifespan of the average American, which is 78 years.

There are an estimated 300 million Americans, so you’re talking

roughly 15.6 billion vegetarian meals (300 million * 52) per year being

the equivalent of taking 5 million cars off the planet’s roads.

There are projected to be 2.75 billion airline passengers in 2011

(http://www.iata.org/pressroom/pr/Pages/2007-24-10-01.aspx).

Assuming 1 meal per flight, and that 75% of current meals are

non-vegetarian, you’re looking at 2.62 billion meals.

Now, if all of those meals were to become vegetarian, the offset would

be equivalent to taking 840,000 cars off the planets roads.

The question now becomes how we can ‘nudge’ the airlines to make this “small but big change”

I made a nasty schoolboy mistake above… it should be 300 million * 52, not /52. Will redo calculations and post an update.