As per the new Carnegie Mellon University research, following the USDA recommendations to consume more fruits, vegetables, dairy and seafood is more harmful to the environment because those foods have relatively high resource uses and greenhouse gas (GHG) emissions per calorie.
The study measured the changes in energy use, blue water footprint and GHG emissions associated with U.S. food consumption patterns.
Eating lettuce is over three times worse in greenhouse gas emissions than eating bacon, said researcher Paul Fischbeck, adding “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.”
On one hand, the results showed that getting our weight under control and eating fewer calories, has a positive effect on the environment and reduces energy use, water use and GHG emissions from the food supply chain by approximately 9 per cent.
However, eating the recommended “healthier” foods, a mix of fruits, vegetables, dairy and seafood, increased the environmental impact in all three categories: Energy use went up by 38 per cent, water use by 10 per cent and GHG emissions by 6 per cent.