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Swapping that steak for a fish filet or a veggie burger is not only good for your health, but the planet’s, too, a new study suggests. The study, published in the American Journal of Clinical Nutrition, ranked various diets based on two measures: nutritional quality and “carbon footprint.” And overall, non-meat diets came out on top, on both counts. Researchers found that on average, vegan and vegetarian diets had the smallest carbon footprint — which refers to the amount of greenhouse gases that are churned into the atmosphere in order to produce the foods the diets comprise. Meanwhile, the pescatarian diet — which includes seafood, but no meat — scored highest in nutritional quality, and was more planet-friendly than diets containing meat. On the opposite end of the spectrum were two diets currently in vogue: the high-fat, low-carbohydrate keto diet; and the paleo diet, which centers on foods its proponents say were consumed in prehistoric times — mainly meat, fish, eggs, nuts and vegetables. Those two meat-heavy eating plans, the study found, carried the biggest carbon footprints and lowest dietary quality. (The keto diet may also be tough on the heart, raising levels of “bad” cholesterol and the risk of artery blockages, according to new research presented at a meeting of the American College of Cardiology). Experts said the findings may give consumers some food… read on > read on >