Alternative To Beef-Diet May Help Build A Friendly Planet

Choosing an alternative to ground beef in the diet of beef-eater may allow for the reduction of greenhouse gas emissions fell by an average of 48 %.

Nearly 48% of diet’s carbon footprint can be slashed easily by beef-eater in America by swapping just one serving per day for a more planet-friendly alternative, as per a new study at Tulane University, published in The American Journal of Clinical Nutrition.

If your New Year’s resolution is to eat better for the planet, a new Tulane University study finds it may be easier than you think.

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‘Choosing an alternative to ground beef in the diet of beef-eater may allow for the reduction of greenhouse gas emissions fell by an average of 48% and water-use impact declined by 30%.’

Using real-world data from a survey of what more than 16,000 Americans eat in an average day, researchers from Tulane University School of Public Health and Tropical Medicine and the University of Michigan calculated how much of a difference people could make if they swapped one high-impact food item for similar, more sustainable options.

They examined how the change would impact two metrics — their daily diets’ greenhouse gas emissions and water scarcity footprint, a measure of the irrigated water used to produce the foods they eat that takes into account regional variations in water scarcity.

The highest impact item in Americans’ diet is beef and around 20% of survey respondents ate at least one serving of it in a day. If they collectively swapped one serving of beef — for example, choosing ground turkey instead of ground beef — their diets’ greenhouse gas emissions fell by an average of 48% and water-use impact declined by 30%.

Choosing Chicken Over Beef Cuts Carbon Footprint
Making one substitution of poultry for beef resulted in an average reduction of dietary greenhouse gases by about a half.

“People can make a significant difference in their carbon footprint with very simple changes — and the easiest one would be to substitute poultry for beef,” said lead author Diego Rose, a professor of nutrition and food security at Tulane University’s School of Public Health and Tropical Medicine.

The study also examined how the change would affect the overall environmental impact of all food consumption in the U.S. in a day — including the 80% of diets without any changes.

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If only the 20% of Americans who ate beef in a day switched to something else for one meal, that would reduce the overall carbon footprint of all U.S. diets by 9.6% and reduce water-use impacts by 5.9%.

Agricultural production accounts for about a quarter of global greenhouse gas emissions and about 70% of global freshwater withdrawals. For the study, researchers built an extensive database of the greenhouse gas emissions and water use related to the production of foods and linked it to a large federal survey that asked people what they ate over a 24-hour period.

Although swapping beef had the greatest impact, they also measured the impact of changing other items. Replacing a serving of shrimp with cod reduced greenhouse gas emissions by 34%; replacing dairy milk with soymilk resulted in an 8% reduction.

The greatest reduction in the water scarcity footprint came from replacing asparagus with peas, resulting in a 48% decrease. Substituting peanuts in place of almonds decreased the water scarcity footprint by 30%.

Although individual substitutions were the focus of the study, Rose said that addressing climate change must involve more than singular actions.

“The changes needed to address our climate problems are major. They are needed across all sectors and along all levels of human organization from international agencies to federal and state governments to communities and households,” Rose said. “Many individuals feel strongly about this and wish to change our climate problem through direct actions that they can control. This, in turn, can change social norms about both the seriousness of the problem and the potential solutions that can address it. Our study provides evidence that even simple steps can assist in these efforts.”

Source-Eurekalert