How Sustainable Is Lab-Grown Meat?
Lab-grown meat is a type of cellular agriculture that grows proteins from a culture, cell by cell, instead of farming it. It’s also called genetically-engineered or cultured meat as well as test-tube meat and stem cell steak.
Singapore was the first country to approve a lab-grown meat product, bringing the possibility of getting our dinner from scientists rather than farmers closer than ever. But is it sustainable?
What’s the Logic Behind Lab-Grown Meat?
Cultured meat is widely hailed for its potential to spare animal lives, cut greenhouse gas emissions, and help solve the global food crisis.
Factory farming is an enormous problem. It’s energy-intensive, contributes to land, water, and air pollution, and accounts for roughly 32% of global methane emissions. Methane is a powerful greenhouse gas that contributes to climate change. Plus, conventional factory farming practices are notoriously cruel to animals.
If the pandemic has taught us anything, it’s that rampant food insecurity affects one in nine Americans, while worldwide, almost 2 billion people are food insecure. The promise of lab-grown meat is an environmentally friendly and humane protein source for the world’s hungry. At least, in theory.
How Do Labs Grow Meat?
No animals are killed to grow meat in a lab. Instead, cells are taken from animal biopsies and grown by in vitro cell culture. To grow animal tissue, labs use similar techniques to those used in regenerative medicine; the difference is that they’re generating it from scratch. This involves intensive work to “feed” and maintain the cultured meat.
Companies like Upside Foods (formerly Memphis Meats), which has been working on cultured meat for years, dub the facilities where they grow their meat products “carneries” (a play on the word “breweries”). These facilities contain big metal vats, called bioreactors, with piping installed to circulate a “watery goo” that helps with tissue engineering. The “goo” consists broadly of amino acids, fats, vitamins, minerals, proteins, sugars, iron, insulin, oxygen — all of the nutrients needed to encourage cell growth.
Is Lab-Grown Meat Safe for the Environment?
Because so much is still based on modeling, we don’t have hard numbers for environmental impact yet, but some early studies estimate it may create more problems than it solves.
The Downsides of Lab-Grown Meat
Animal agriculture accounts for more than 14% of global GHG emissions caused by human activity, but lab-grown meat may, in fact, worsen climate change. Although it’s expected to produce more CO2 than the more potent methane, CO2 takes much longer to dissipate.
Plus, the inferred “cruelty-free” nature of lab-grown meat can be misleading. The “goo” needed to culture the meat currently requires fetal bovine serum, which is obtained through a process that raises ethical concerns.
Due to the many variables, production is very expensive. When cultured meat becomes available for wide consumption, it will be pricier than conventional meat for some time — in 2013, this would have been $300,000 for one burger; today, cultured meat would cost closer to $3,800/pound.
Some of these variables include energy used (and emissions created) to culture and nurture the meat; the need for sugar to feed the cells (likely from corn, which requires land use); and unclear plans for waste treatment at “carneries.”
The Upsides of Lab-Grown Meat
According to Dr. Carolyn Mattick, who conducts sustainability studies on lab-grown meat, it likely wins against factory farming with a drastically lower amount of water pollution and land use.
While there are concerns over potential bacterial contamination of the cultures, there is also the potential reduced risk of disease from meat produced without livestock kept in such close quarters. This may even help convert farmers to the cause in the long run.
Lab-grown meat may also become a boon for food security. Although the process is expensive now, Memphis Meats investor Ryan Bethencourt believes it has the potential to feed millions in the long run for $1-2/pound.
Ultimately, if scientists conclude cultured meat is better for the environment, it may divert more meat-eaters from the factory farming status quo. For many, the biggest barrier to reducing dietary meat consumption is cultural; some even believe dominion over animals is a God-given right, which could make lab-grown meat a hard sell.
What’s in the Cards for Cultured Meat?
For the moment, the idea of genetically engineering meat is bogged down in regulatory disagreements between the FDA and USDA. In the long term, widescale production of cultured meat would need cost- and resource-effective energy infrastructures to be feasible.
It also wouldn’t replace factory farming anytime soon. Steve Myrick, vice president of operations at Upside Foods (formerly Memphis Meats), says the current goal of cultured meat is to “augment, not disrupt” and “coexist, respect consumer traditions” with Big Meat.
As for the sustainability question, there are no clear answers yet (but there’s a lot of healthy skepticism). Dr. Mattick says lab-grown meat is “not inherently better or worse, but different.” So, it’s not an automatic win as some believe — but it has potential.
Originally published on February 4, 2021, this article was updated in January 2023.
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