“Average daily greenhouse gas emissions, expressed in kilograms of carbon dioxide equivalent per 1000 kcal, were calculated for each diet studied. Nutrient quality was determined using several indices of Healthy eating”, says the study. After sifting through these eating patterns, the researchers established a ranking ranging from the most to the least polluting regimes.
The ketogenic dietwhich favors large amounts of fat and the carbohydrates in low amountsgenerates nearly 3 kg of carbon dioxide per 1000 calories consumed. It is he who wins the prize for the least ecological diet.
It is followed by paleolithic diet, which gives pride of place to proteins and plants but which prohibits certain foods such as cereals and dairy products. In terms of impact on the planet, its score is estimated at 2.6 kg CO2-eq per 1000 kcal. The omnivorous diet (adopted by 86% of survey participants) is estimated to 2,23 kg CO2-eq pour 1000 kcal.