Gas stoves are contributing more to global warming than previously thought because of constant tiny methane leaks while they’re off, a new study found.
The same study that tested emissions around stoves in homes raised new concerns about indoor air quality and health because of levels of nitrogen oxides measured.
Even when they are not running, U.S. gas stoves are putting 2.6 million tons (2.4 million metric tons) of methane — in carbon dioxide equivalent units — into the air each year, a team of California researchers found in a study published in Thursday’s journal Environmental Science & Technology. That’s equivalent to the annual amount of greenhouse gases from 500,000 cars or what the United States puts into the air every three-and-a-half hours.
“They’re constantly bleeding a little bit of methane into the atmosphere all the time,” said the study's co-author Rob Jackson, a Stanford University climate scientist.
That methane is on top of the 6.8 million tons (6.2 million metric tons) of carbon dioxide that gas stoves emit into the air when they are in use and the gas is burned, the study said. Methane is a greenhouse gas that is dozens of times more potent than carbon dioxide but doesn’t stay in the atmosphere nearly as long and isn’t as plentiful in the air.
The researchers examined 53 home kitchens in California — many in bed and breakfasts they rented. They sealed most of the rooms in plastic tarps and then measured emissions when the stoves were working and when they were not. And what was surprising was that three-quarters of the methane released happened while the stoves were off, Jackson said. Those are emissions releases that the government doesn’t account for, he said.
“That’s a big deal because we’re trying to really reduce our carbon footprint and we claim that gas is cleaner than coal, which it is,” said study lead author Eric Lebel, a scientist at PSE Healthy Energy, an Oakland nonprofit. But he said much of the benefit disappears when leaks are taken into account.
Many communities have bans on gas stove use in future new construction that will take effect in future years, including New York City and the Bay Area cities of San Francisco, Oakland, San Jose, and Berkeley, Jackson said.
“People can already choose electric appliances if they want,” said Frank Maisano, a Washington policy and public relations expert who represents gas and appliance interests. “People just like gas appliances because they perform better, especially in colder climates.”
“Natural gas appliances are generally more energy- and cost-effective than their electric counterparts,” Maisano said.
Jackson estimated that when all natural gas use and extraction is taken into account, about 100 million tons (91 million metric tons) of gas leaks into the atmosphere. And the couple million tons from gas stoves “is meaningful. That’s a substantial part and it’s a part that we haven’t included accurately in the past.”
The leakage finding is “a very important takeaway” and fits with other work that found there are often big leaks that account for much of the emissions, said Zachary Merrin, a research engineer with the Illinois Applied Research Institute’s Indoor Climate Research & Training group.
Merrin, who wasn't part of the study, said the emission of un-combusted methane is "clearly bad. From an emissions standpoint, cooking directly with gas is better than using a fossil fuel powered electric stove but worse than using a solar powered electric stove.”
The methane leak isn’t dangerous to human health or as a possible explosive, Jackson said. But when conducting the tests, researchers found high levels of nitrogen oxides, greater than 100 parts per billion. Jackson said the U.S. Environmental Protection Agency doesn’t have indoor air quality standards for that gas, but the measurements they took exceed its outdoor air quality standards. While methane doesn’t include nitrogen, the nitrogen oxides are byproducts of the combustion in natural gas ovens, he said.
Maisano said people should always use hood ranges and make sure they have proper ventilation. Jackson, who has a gas stove that he plans to replace, said he never used ventilation before this study, but that he now does so every time.
The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.
Ellen Fitzsimmons-Craft, assistant professor of psychiatry at Washington University School of Medicine, joins Cheddar News to discuss how chatbots can help prevent eating disorders and the research that uncovered these findings.
Shoulder injuries are one of the most common orthopedic injuries – and they're also one of the most commonly ignored. But chimpanzees, with whom we share nearly 99% of our DNA, don’t encounter the same issues we do. So why are human shoulders such a design disaster? Well, we can trace the answer back to a very particular moment in our evolution.
As the Omicron variant continues to sweep across the country. The US Supreme Court is expected to hear arguments at the end of this week on whether or not the Biden administration can force private companies to vaccinate or test millions of their employees. In addition, the National Nurses United has spearheaded legal action to protect nurses and health care workers, patients, and the public while on the job. President of the National Nurses Union, Zenei Cortez, joined Cheddar to discuss more.
Digital medical care provider Pear Therapeutics rang the closing bell on the Nasdaq Friday and President and CEO Dr. Corey McCann, joined Cheddar to talk about how the company plans to grow the business of software-based therapeutics and how the first FDA authorized prescription digital therapeutics company will go about treating illnesses like insomnia and addiction. "These really are pieces of software. In many cases, they're apps and in the cases of our addiction products, these are based on something called cognitive behavioral therapy or CBT," he said. "These products change the patient's brain circuitry to help them be abstinent, to help them stay in treatment, and that's exactly what we see in randomized clinical trials and that's what we see in the real world." He also addressed the ongoing mental health crises brought on by the pandemic. **copy updated to remove IPO information as Pear Therapeutics went public in December**
Jake Carbone, senior data analyst at InfluenceMap joins Cheddar News to talk about a new report by The Guardian and InfluenceMap that reveals how companies are creating fossil fuel ads designed to look like Google search results.
Satellite launch service Virgin Orbit has gone public on the Nasdaq via a SPAC merger with NextGen Acquisitions with a valuation of about $3.2 billion. CEO Dan Hart joined Cheddar's "Between Bells" from in front of his LauncherOne rocket in New York City's Times Square to talk about what's next after the IPO, an upcoming "Above the Clouds" mission to deliver commercial and national security payloads, and the benefits of their rockets being launched from commercial 747 aircraft. "We can launch anywhere in the world," he said. "There are almost 80 space agencies across the world, for instance, and about 10 of them have space launch. We can give them a space flight capability overnight by taking a runway and turning it into a spaceport."
The year 2021 saw numerous natural disasters around the world, including extreme heat and wildfires, rare deep freezes, and historic flooding. This year's United Nations COP26 conference was key for getting world leaders on board with emissions reductions and other climate-focused policies as the UN Secretary-General said the agency's report on global warming is a 'code red for humanity.' In the U.S., President Joe Biden has focused most of his domestic agenda on slashing emissions and building climate-focused infrastructure. Guests from The Economist, UNC-Chapel Hill, Global Rescue, and more join Cheddar Climate's year-end special to discuss how the climate changed in 2021, and what to expect in 2022.
Digital mental health company Little Otter recently announced it closed a $22 million Series A round. Little Otter was founded in 2020 by a mother-daughter team, which based the company on the idea that a child's mental health can only be addressed by treating the whole family through technology available to everyone. Little Otter CEO and co-founder Rebecca Egger and her mother, Little Otter Chief Medical and Scientific Officer and co-founder Dr. Helen Egger joined Cheddar News' Closing Bell to discuss.
Among all the other events of the last few years, you may have missed this one: Spermageddon. This is the fun name for the idea that sperm counts among mainly ‘Western’ men are in freefall. The Spermageddon hype began with the publication of a 2017 study showing a nearly 60% drop in overall sperm counts in men living in North America, Europe, Australia, and New Zealand.
But four years later, it seems that Spermageddon has been overblown. By a lot. And all that hype has obscured the real issue behind declining male fertility.
Covid-19 has changed the way we view wellness. Jillian Hughes, communications director of Mental Health America, joins Cheddar News to discuss breaking the stigma around mental health. Justin Davis, CEO and co-founder of Spectrum Labs, weighs in on how social media impacts our wellbeing. Lastly, Precision Nutrition CEO Timothy Jones advices us on what trends to watch in 2022.
