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Lisa Rathke / AP

If half the meat eaten worldwide was replaced by insects (think: crickets and mealworms), greenhouse gas emissions would be significantly reduced and farmland use would be cut by one-third, a new study shows. It's a radical new solution for tackling livestock effects on the environment, but the idea of eating insects for sustainability has been thrown around for years.

The study: Researchers at the University of Edinburgh compared how conventional meat production from cattle and chicken compared to the process of cultivating alternative meat sources, like insects, lab-grown meat and tofu. They found insects and tofu are the most sustainable and environmentally friendly options because they take up the least amount of land and require the least amount of energy to process.

Why it matters: In the US, insects are typically eaten for the "fear factor" or shock value, rather than their nutritional value. Continued research into the benefits of eating insects could change that, help the environment, and provide high-protein, sustainable alternatives to meat. After all, insects are common meals in other countries.

What's next: The researchers considered the effects of replacing half of the animal products, like beef and chicken, would be replaced with insects. They estimated that would free up 1680 million hectares of land, which is equivalent to 70 times the size of the UK.

The stats: It's been estimated that cattle can account for 75% of greenhouse gas emissions from livestock production. And there are other effects of livestock production: Pasture covers twice the area of cropland around the world, and livestock consume around one-third of all harvested crops, per the study.

The solution: "A mix of small changes in consumer behaviour, such as replacing beef with chicken, reducing food waste and potentially introducing insects more commonly into diets, would help achieve land savings and a more sustainable food system," said Dr. Peter Alexander, of the University of Edinburgh's School of GeoSciences and Scotland's Rural College.

Flashback: In 2011, a college student at University of Chicago launched a startup that analyzed edible insects and tried to bring them to the market for consumption.

Go deeper

1 hour ago - Health

U.S. ahead of pace on vaccines

A health care worker administers a dose of the Moderna vaccine in Ruleville, Mississippi. Photo: Rory Doyle/Bloomberg via Getty Images

The U.S. is now vaccinating an average of 2 million people a day, up from 1.3 million in early February.

Why it matters: That puts us on track to hit President Biden's goal of 100 million doses a month ahead of schedule.

Updated 3 hours ago - Politics & Policy

Harris breaks tie as Senate proceeds with lengthy debate on COVID relief bill

Photo: Oliver Contreras/Bloomberg via Getty Images

The Senate on Thursday voted 51-50 — with Vice President Kamala Harris breaking the tie — to proceed to debate on President Biden's $1.9 trillion coronavirus rescue package, likely setting up a final vote this weekend.

The state of play: Sen. Ron Johnson (R-Wis.) is forcing the Senate clerk to read the entire 628-page bill on the floor, a procedural move that will likely add 10 hours to the 20 hours already allotted for debate.

4 hours ago - World

Netanyahu campaigns against Biden's plan to save Iran deal

Netanyahu campaigns at a gym last month. Photo: Pool/AFP via Getty

Israeli Prime Minister Benjamin Netanyahu indirectly criticized the Biden administration for its intention to return to the Iran nuclear deal and told his supporters he was prepared to "stand against the entire world" to stop it.

Why it matters: This is a major change of tune for Netanyahu, who had been careful in his statements on the Iran deal and avoided publicly criticizing President Biden. The statement was part of Netanyahu's attempt to rally his base ahead of Israel's election on March 23.