study in the US found animal products responsible for 83.5 percent of diet
related greenhouse gas emissions – and 20 percent of Americans accountable for
almost half overall.
The study –
conducted by University of Michigan and Tulane University, and published in Environmental Research Letters – analyzed the impact
of over 300 foods, and the diets of 16,000 Americans.
It revealed that only 20 percent of Americans – those who eat the most animal
products – are responsible for 46 percent of food-related emissions overall on
an average day.
studied were divided into categories, with the meat, dairy, egg, and fish and
seafood groups accounting for 83.5 percent cumulatively – while plant-based
foods were responsible for significantly less.
categories of fruits, vegetables, cereals and grains, and nuts and seeds
accounted for less than three percent of diet-related emissions each.
consumption was found to be the least detrimental – with the food group causing
just 0.3 percent of emissions.
of Tulane University, said that while most studies of this kind look at an
average national diet, this is the first in the US to rely instead on
individual reports of daily consumption.
allowed for a comparison of the least detrimental diets, of those in a group
the researched called the ‘first quintile’, to the most negatively impactful
eaters, the ‘fifth quintile’.
The study demonstrates that a change in diet – especially for the top contributors
– could have a tremendous impact on food-related emissions, overall.
of Michigan researcher, Martin Heller said: “Reducing the impact of our
diets – by eating fewer calories and less animal-based foods – could achieve
significant reductions in greenhouse gas emissions in the United States.
climate action that is accessible to everyone, because we all decide on a daily
basis what we eat.”