http://www.timesonline.co.uk/tol/news/uk/science/article2195538.ece The sums were done by Chris Goodall, campaigning author of How to Live a Low-Carbon Life, based on the greenhouse gases created by intensive beef production. “Driving a typical UK car for 3 miles [4.8km] adds about 0.9 kg [2lb] of CO2 to the atmosphere,” he said, a calculation based on the Government’s official fuel emission figures. “If you walked instead, it would use about 180 calories. You’d need about 100g of beef to replace those calories, resulting in 3.6kg of emissions, or four times as much as driving. Gee, I wonder if it'd be OK to take walks if we switched to veggies. :laugh: Maybe vegetarian couch potatoes should get some form of tax credits.