Basically it has to do with the fact that cooking meat is a large contributor to atmospheric pollution. If one were concerned with how much pollutants they contribute to the atmosphere, consider this... Some estimates go so far to say that cooking one normal sized hamburger emits roughly the same amount of volatile organic compounds (includes formaldehyde and acetaldehyde among others) into the atmosphere as driving an average current model car 250 miles.

To equate it to something... It's estimated that 16,000 restaurants in New Jersey pollute more than all of the heavy diesel vehicles in the state.

The EPA is studying these claims. California has began implementing regulations on certain cooking devices in the same way that catalytic converters are regulated and required on the exhaust systems of automobiles.

Maybe Morgan Spurlock and Al Gore need to get together to make "An Inconvenient Super Size"