Rajendra Pachauri, a senior UN scientist, has suggested that people might want to eat less meat, if they are seriously concerned about global warming. This is something of a no-brainer - people eating less meat means less cows pumping methane into the atmosphere. It also means less pressure on CO2 absorbing rainforests from cattle ranchers. I suspect, though, that meat people would sooner cut their left hand off than eat less meat, so I don't know why Dr Pachauri is bothering.
BBC News report