RE: The food carbon calculator: How does the food you eat affect global warming?
Hates Idiots states: "I'll bet the CO2 from a billion people exceeds that from a million cars."
If he is correct, then maybe all we need to do is reduce China's overcrowded population. This will serve two functions - 1) Reduce the CO2 that those people exhale, and 2) Reduce their need for fossil fuels for cars, electricity, etc.