On December 14, 2015 an article titled Vegetarian and “Healthy” Diets Could Be More Harmful to the Environment was published on the Carnegie Mellon University website.
The article quotes Paul Fischbeck, a professor of social and decisions sciences and engineering and public policy at the institute.
He was a co-author of a paper Energy use, blue water footprint, and greenhouse gas emissions for current food consumption patterns and dietary recommendations in the US.
Professor Fischbeck is quoted in the website article, stating “Eating lettuce is over three times worse in greenhouse gas emissions than eating bacon. 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.”