"Eating lettuce is over three times worse in greenhouse gas emissions than eating bacon," said Paul Fischbeck, professor of social and decisions sciences at CMU. "Lots of common vegetables require more resources per calorie than you would think. Eggplant, celery and cucumbers look particularly bad when compared to pork or chicken."
The team's study of the supply chain showed that eating fewer calories overall would produce less greenhouse gas, but eating "healthier" — a mix of vegetables, dairy and seafood — would increase energy use by 38 percent, water use by 10 percent and greenhouse gas emissions by 6 percent.
