The best of EcoWatch, right in your inbox. Sign up for our email newsletter!
Lab Grown Meat Could Be Worse for the Climate Than Farm-Raised Beef, Oxford Study
2018 saw a number of studies pointing to the outsized climate impact of meat consumption. Beef has long been singled out as particularly unsustainable: Cows both release the greenhouse gas methane into the atmosphere because of their digestive processes and require a lot of land area to raise. But for those unwilling to give up the taste and texture of a steak or burger, could lab-grown meat be a climate-friendly alternative? In a first-of-its-kind study, researchers from the Oxford Martin School set out to answer that question.
The results, published in Frontiers in Sustainable Food Systems Tuesday, concluded that lab-grown meat could actually make climate change worse. It all depends on whether the energy used to grow the cultured meat is still generated from fossil fuels.
"The climate impacts of cultured meat production will depend on what level of sustainable energy generation can be achieved, as well as the efficiency of future culture processes," lead study author Dr. John Lynch said in a press release.
To reach their conclusions, researchers compared the greenhouse gas emissions of three different methods of cattle farming and four methods of growing lab-based meat, assuming the energy system remained the same as it is today. They then calculated how those emissions would impact global temperatures over the next 1,000 years. In some cases, they found, lab-grown meat would actually generate higher temperatures.
The reason all hinges on the different ways that methane and carbon dioxide behave in the atmosphere:
"Cattle are very emissions-intensive because they produce a large amount of methane from fermentation in their gut," study co-author and Halley Professor of Physics at the University of Oxford Raymond Pierrehumbert said in the press release. "Methane is an important greenhouse gas, but the way in which we generally describe methane emissions as 'carbon dioxide equivalent' amounts can be misleading because the two gases are very different. Per tonne emitted, methane has a much larger warming impact than carbon dioxide, however, it only remains in the atmosphere for about 12 years whereas carbon dioxide persists and accumulates for millennia. This means methane's impact on long-term warming is not cumulative and is impacted greatly if emissions increase or decrease over time."
Because of this, energy-intensive methods for growing cultured meat that release carbon dioxide could have longer-term climate impacts than cattle raising.
The researchers said that there was certainly potential in developing lab-grown meat, and it had other benefits such as freeing land for carbon sequestration. However, it was important to consider all potential consequences of both methods.
"If we simply replace that methane with carbon dioxide it could actually have detrimental long-term consequences," Lynch said.
Cultured meat has yet to be mass-produced for public consumption, BBC News noted. A Dutch lab claimed to have made the first lab-grown burger in 2013. Last year, a company named Just made lab-grown chicken nuggets.
"Essentially, the process involves collecting stem cells from animal tissue and then getting them to differentiate into fibres, these are then developed and grown into a sufficient mass of muscle tissue that can be harvested and sold as meat," Matt McGrath wrote for BBC News.
EcoWatch Daily Newsletter
‘Companies Should Not Be Allowed to Use Hazardous Ingredients in Products People Use’: Michelle Pfeiffer Speaks Up for Safer Cosmetics
The beauty products we put on our skin can have important consequences for our health. Just this March, the U.S. Food and Drug Administration (FDA) warned that some Claire's cosmetics had tested positive for asbestos. But the FDA could only issue a warning, not a recall, because current law does not empower the agency to do so.
Michelle Pfeiffer wants to change that.
The actress and Environmental Working Group (EWG) board member was spotted on Capitol Hill Thursday lobbying lawmakers on behalf of a bill that would increase oversight of the cosmetics industry, The Washington Post reported.
By Julia Conley
Scientists at the United Nations' intergovernmental body focusing on biodiversity sounded alarms earlier this month with its report on the looming potential extinction of one million species — but few heard their calls, according to a German newspaper report.
The climate crisis is a major concern for American voters with nearly 40 percent reporting the issue will help determine how they cast their ballots in the upcoming 2020 presidential election, according to a report compiled by the Yale Program on Climate Change Communication.
Of more than 1,000 registered voters surveyed on global warming, climate and energy policies, as well as personal and collective action, 38 percent said that a candidate's position on climate change is "very important" when it comes to determining who will win their vote. Overall, democratic candidates are under more pressure to provide green solutions as part of their campaign promises with 64 percent of Democrat voters saying they prioritize the issue compared with just 34 percent of Independents and 12 percent of Republicans.
President Donald Trump has agreed to sign a $19.1 billion disaster relief bill that will help Americans still recovering from the flooding, hurricanes and wildfires that have devastated parts of the country in the past two years. Senate Republicans said they struck a deal with the president to approve the measure, despite the fact that it did not include the funding he wanted for the U.S.-Mexican border, CNN reported.
"The U.S. Senate has just approved a 19 Billion Dollar Disaster Relief Bill, with my total approval. Great!" the president tweeted Thursday.
"There was a lot of devastation throughout the state," Governor Mike Parson said at a Thursday morning press conference, as NPR reported. "We were very fortunate last night that we didn't have more injuries than what we had, and we didn't have more fatalities across the state. But three is too many."