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SAN DIEGO — While there is currently no smoking gun definitively showing that indoor nitrogen dioxide (NO2) concentrations from gas appliances are a cause of pulmonary diseases, the circumstantial evidence of the baleful effects of gas stoves on lung function is pretty compelling, said participants in a pro-con debate.
The debate was held at the American Thoracic Society’s international conference.
PRO: Gas stoves cause lung disease
Arguing for the “pro” side, John R. Balmes, MD of the University of California, San Francisco, and a physician member of the California Air Resources Board, began by admitting that “I would never have said gas stoves cause lung disease, but that’s what they assigned me.”
Gamely proceeding anyway, Dr. Balmes noted that natural gas — methane — is a potent greenhouse gas, and that cooking with natural gas leads to generation of NO2 with high peak concentrations in the home, especially in the kitchen, but in other rooms as well.
“We know that NO2 is an irritant gas that can cause bronchoconstriction, airway hyperresponsiveness and inflammation, and there’s increased risk of asthma and COPD exacerbations,” he said.
The US Environmental Protection Agency (EPA) outdoor ambient air standard for NO2 is 100 parts per billion (ppb) or lower, which are the levels needed to prevent asthma exacerbations. In separate meta-analyses there was a 1.05 rise in asthma incidence per every 2 ppb of NO2, and an increase of 1.07 in COPD incidence for every 5 ppb of NO2, Dr. Balmes noted.
The respiratory effects of gas stoves were revealed in a 2013 meta-analysis of 10 studies from North America and Europe, which showed a pooled odds ratio for current asthma of 1.34. Building on these data, authors of a 2022 paper estimated that 13% of childhood asthma could be prevented by elimination gas cooking.
Although the causative link is missing, the evidence is abundant that natural gas isn’t good for anyone, he acknowledged.
Con: More evidence needed
Arguing for the “con” side of the question, Meredith C. McCormack, MD, MHS, professor of medicine in the pulmonary and critical care division at Johns Hopkins University in Baltimore, said that “more definitive evidence is needed to define whether gas stoves cause lung disease.”
But Dr. McCormack didn’t let the natural gas industry off the hook, noting that a systematic review and meta-analysis of cooking with gas in high-, middle-, and low-income countries showed that domestic use of gas fuels vs. electric was associated with increased risk of asthma (1.11 overall), COPD (1.15), and pneumonia (1.26).
The link between gas and risk of asthma was significant only for adults, however, and the data on the risks for COPD and for pneumonia or other respiratory infections came almost exclusively from low-income countries, she noted.
Despite the lack of evidence for a causative link, however, Dr. McCormack pointed to evidence that indoor NO2 is an air pollutant that acts as a respiratory irritant, and that indoor NO2 levels in homes with gas stoves have been shown to be more than twice as high as those in homes with electric stoves.
Other evidence shows that indoor NO2 is associated with increased symptoms and use of rescue medications for children with asthma, and with shortness of breath, nocturnal symptoms, reduction in lung function, and exacerbations in COPD.
Still other studies have shown that exchanging a gas stove for an electric stove can reduce NO2 concentrations in the home by up to 50%, but there is still a need for clinical trial evidence of a health benefit for such an exchange, she said.
And even if a gas stove is swapped out for an electric or induction range, household members with asthma are exposed to other hazards, including second-hand smoke, cooking exhaust, candle or incense burning, outdoor particulate matter that finds its way indoors, mold, and mouse or cockroach allergens, she noted.
On common ground
Environmental interventions that can benefit all members of a household — not just those with obstructive pulmonary disease — include smoking cessation, charcoal filter-equipped air cleaners, stove hoods that vent outdoors, integrated pest management, hypoallergenic pillow and mattress covers, high efficiency particulate air (HEPA) vacuums, and mold and radon abatement.
Both Dr. Balmes and Dr. McCormack agreed in the end that gas stoves contribute to respiratory morbidity, and that both state and national policy changes are needed to support transition to cleaner indoor air, with financial incentives available for households with more modest incomes.
“For everyone, there is a climate-change mitigation imperative to transition away from gas appliances if we want to tackle the climate emergency,” Dr. Balmes said.
End indoor combustion
George D. Thurston, ScD, professor of medicine and population health at the NYU Grossman School of Medicine, who attended the debate, told Chest Physician that the participants talked about NO2 but didn’t touch on particulate pollution generated by gas stoves.
Burning natural gas produces particles that are very similar in composition to those produced by burning coal, oil, or diesel fuel, Dr. Thurston said, and he pointed out that interventions such as range hoods work only if they actually vent outdoors, and aren’t simply fans that recirculate the air within the home. And even when ventilation works as it should to move air out of the house, it only pumps it back into the atmosphere, where it contributes to climate change.
“We need combustion-free homes. That’s the unifying principle. We have to keep our eyes on that prize,” he said.
Dr. Balmes, Dr. McCormack, and Dr. Thurston all reported having no relevant disclosures.
SAN DIEGO — While there is currently no smoking gun definitively showing that indoor nitrogen dioxide (NO2) concentrations from gas appliances are a cause of pulmonary diseases, the circumstantial evidence of the baleful effects of gas stoves on lung function is pretty compelling, said participants in a pro-con debate.
The debate was held at the American Thoracic Society’s international conference.
PRO: Gas stoves cause lung disease
Arguing for the “pro” side, John R. Balmes, MD of the University of California, San Francisco, and a physician member of the California Air Resources Board, began by admitting that “I would never have said gas stoves cause lung disease, but that’s what they assigned me.”
Gamely proceeding anyway, Dr. Balmes noted that natural gas — methane — is a potent greenhouse gas, and that cooking with natural gas leads to generation of NO2 with high peak concentrations in the home, especially in the kitchen, but in other rooms as well.
“We know that NO2 is an irritant gas that can cause bronchoconstriction, airway hyperresponsiveness and inflammation, and there’s increased risk of asthma and COPD exacerbations,” he said.
The US Environmental Protection Agency (EPA) outdoor ambient air standard for NO2 is 100 parts per billion (ppb) or lower, which are the levels needed to prevent asthma exacerbations. In separate meta-analyses there was a 1.05 rise in asthma incidence per every 2 ppb of NO2, and an increase of 1.07 in COPD incidence for every 5 ppb of NO2, Dr. Balmes noted.
The respiratory effects of gas stoves were revealed in a 2013 meta-analysis of 10 studies from North America and Europe, which showed a pooled odds ratio for current asthma of 1.34. Building on these data, authors of a 2022 paper estimated that 13% of childhood asthma could be prevented by elimination gas cooking.
Although the causative link is missing, the evidence is abundant that natural gas isn’t good for anyone, he acknowledged.
Con: More evidence needed
Arguing for the “con” side of the question, Meredith C. McCormack, MD, MHS, professor of medicine in the pulmonary and critical care division at Johns Hopkins University in Baltimore, said that “more definitive evidence is needed to define whether gas stoves cause lung disease.”
But Dr. McCormack didn’t let the natural gas industry off the hook, noting that a systematic review and meta-analysis of cooking with gas in high-, middle-, and low-income countries showed that domestic use of gas fuels vs. electric was associated with increased risk of asthma (1.11 overall), COPD (1.15), and pneumonia (1.26).
The link between gas and risk of asthma was significant only for adults, however, and the data on the risks for COPD and for pneumonia or other respiratory infections came almost exclusively from low-income countries, she noted.
Despite the lack of evidence for a causative link, however, Dr. McCormack pointed to evidence that indoor NO2 is an air pollutant that acts as a respiratory irritant, and that indoor NO2 levels in homes with gas stoves have been shown to be more than twice as high as those in homes with electric stoves.
Other evidence shows that indoor NO2 is associated with increased symptoms and use of rescue medications for children with asthma, and with shortness of breath, nocturnal symptoms, reduction in lung function, and exacerbations in COPD.
Still other studies have shown that exchanging a gas stove for an electric stove can reduce NO2 concentrations in the home by up to 50%, but there is still a need for clinical trial evidence of a health benefit for such an exchange, she said.
And even if a gas stove is swapped out for an electric or induction range, household members with asthma are exposed to other hazards, including second-hand smoke, cooking exhaust, candle or incense burning, outdoor particulate matter that finds its way indoors, mold, and mouse or cockroach allergens, she noted.
On common ground
Environmental interventions that can benefit all members of a household — not just those with obstructive pulmonary disease — include smoking cessation, charcoal filter-equipped air cleaners, stove hoods that vent outdoors, integrated pest management, hypoallergenic pillow and mattress covers, high efficiency particulate air (HEPA) vacuums, and mold and radon abatement.
Both Dr. Balmes and Dr. McCormack agreed in the end that gas stoves contribute to respiratory morbidity, and that both state and national policy changes are needed to support transition to cleaner indoor air, with financial incentives available for households with more modest incomes.
“For everyone, there is a climate-change mitigation imperative to transition away from gas appliances if we want to tackle the climate emergency,” Dr. Balmes said.
End indoor combustion
George D. Thurston, ScD, professor of medicine and population health at the NYU Grossman School of Medicine, who attended the debate, told Chest Physician that the participants talked about NO2 but didn’t touch on particulate pollution generated by gas stoves.
Burning natural gas produces particles that are very similar in composition to those produced by burning coal, oil, or diesel fuel, Dr. Thurston said, and he pointed out that interventions such as range hoods work only if they actually vent outdoors, and aren’t simply fans that recirculate the air within the home. And even when ventilation works as it should to move air out of the house, it only pumps it back into the atmosphere, where it contributes to climate change.
“We need combustion-free homes. That’s the unifying principle. We have to keep our eyes on that prize,” he said.
Dr. Balmes, Dr. McCormack, and Dr. Thurston all reported having no relevant disclosures.
SAN DIEGO — While there is currently no smoking gun definitively showing that indoor nitrogen dioxide (NO2) concentrations from gas appliances are a cause of pulmonary diseases, the circumstantial evidence of the baleful effects of gas stoves on lung function is pretty compelling, said participants in a pro-con debate.
The debate was held at the American Thoracic Society’s international conference.
PRO: Gas stoves cause lung disease
Arguing for the “pro” side, John R. Balmes, MD of the University of California, San Francisco, and a physician member of the California Air Resources Board, began by admitting that “I would never have said gas stoves cause lung disease, but that’s what they assigned me.”
Gamely proceeding anyway, Dr. Balmes noted that natural gas — methane — is a potent greenhouse gas, and that cooking with natural gas leads to generation of NO2 with high peak concentrations in the home, especially in the kitchen, but in other rooms as well.
“We know that NO2 is an irritant gas that can cause bronchoconstriction, airway hyperresponsiveness and inflammation, and there’s increased risk of asthma and COPD exacerbations,” he said.
The US Environmental Protection Agency (EPA) outdoor ambient air standard for NO2 is 100 parts per billion (ppb) or lower, which are the levels needed to prevent asthma exacerbations. In separate meta-analyses there was a 1.05 rise in asthma incidence per every 2 ppb of NO2, and an increase of 1.07 in COPD incidence for every 5 ppb of NO2, Dr. Balmes noted.
The respiratory effects of gas stoves were revealed in a 2013 meta-analysis of 10 studies from North America and Europe, which showed a pooled odds ratio for current asthma of 1.34. Building on these data, authors of a 2022 paper estimated that 13% of childhood asthma could be prevented by elimination gas cooking.
Although the causative link is missing, the evidence is abundant that natural gas isn’t good for anyone, he acknowledged.
Con: More evidence needed
Arguing for the “con” side of the question, Meredith C. McCormack, MD, MHS, professor of medicine in the pulmonary and critical care division at Johns Hopkins University in Baltimore, said that “more definitive evidence is needed to define whether gas stoves cause lung disease.”
But Dr. McCormack didn’t let the natural gas industry off the hook, noting that a systematic review and meta-analysis of cooking with gas in high-, middle-, and low-income countries showed that domestic use of gas fuels vs. electric was associated with increased risk of asthma (1.11 overall), COPD (1.15), and pneumonia (1.26).
The link between gas and risk of asthma was significant only for adults, however, and the data on the risks for COPD and for pneumonia or other respiratory infections came almost exclusively from low-income countries, she noted.
Despite the lack of evidence for a causative link, however, Dr. McCormack pointed to evidence that indoor NO2 is an air pollutant that acts as a respiratory irritant, and that indoor NO2 levels in homes with gas stoves have been shown to be more than twice as high as those in homes with electric stoves.
Other evidence shows that indoor NO2 is associated with increased symptoms and use of rescue medications for children with asthma, and with shortness of breath, nocturnal symptoms, reduction in lung function, and exacerbations in COPD.
Still other studies have shown that exchanging a gas stove for an electric stove can reduce NO2 concentrations in the home by up to 50%, but there is still a need for clinical trial evidence of a health benefit for such an exchange, she said.
And even if a gas stove is swapped out for an electric or induction range, household members with asthma are exposed to other hazards, including second-hand smoke, cooking exhaust, candle or incense burning, outdoor particulate matter that finds its way indoors, mold, and mouse or cockroach allergens, she noted.
On common ground
Environmental interventions that can benefit all members of a household — not just those with obstructive pulmonary disease — include smoking cessation, charcoal filter-equipped air cleaners, stove hoods that vent outdoors, integrated pest management, hypoallergenic pillow and mattress covers, high efficiency particulate air (HEPA) vacuums, and mold and radon abatement.
Both Dr. Balmes and Dr. McCormack agreed in the end that gas stoves contribute to respiratory morbidity, and that both state and national policy changes are needed to support transition to cleaner indoor air, with financial incentives available for households with more modest incomes.
“For everyone, there is a climate-change mitigation imperative to transition away from gas appliances if we want to tackle the climate emergency,” Dr. Balmes said.
End indoor combustion
George D. Thurston, ScD, professor of medicine and population health at the NYU Grossman School of Medicine, who attended the debate, told Chest Physician that the participants talked about NO2 but didn’t touch on particulate pollution generated by gas stoves.
Burning natural gas produces particles that are very similar in composition to those produced by burning coal, oil, or diesel fuel, Dr. Thurston said, and he pointed out that interventions such as range hoods work only if they actually vent outdoors, and aren’t simply fans that recirculate the air within the home. And even when ventilation works as it should to move air out of the house, it only pumps it back into the atmosphere, where it contributes to climate change.
“We need combustion-free homes. That’s the unifying principle. We have to keep our eyes on that prize,” he said.
Dr. Balmes, Dr. McCormack, and Dr. Thurston all reported having no relevant disclosures.
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All rights reserved. This material may not be published, broadcast, copied, or otherwise reproduced or distributed without the prior written permission of Frontline Medical Communications Inc.</copyrightNotice> </rightsInfo> </provider> <abstract/> <metaDescription>In what the moderator called “one of the most agreeable debates yet,” experts presented their views on the risks that cooking with natural gas pose on pulmonary</metaDescription> <articlePDF/> <teaserImage>301514</teaserImage> <teaser>Indoor pollution from gas stoves can exacerbate asthma and COPD, but it’s still unclear whether it can cause COPD.</teaser> <title>Debate on safety of gas stoves isn’t just hot air</title> <deck/> <disclaimer/> <AuthorList/> <articleURL/> <doi/> <pubMedID/> <publishXMLStatus/> <publishXMLVersion>1</publishXMLVersion> <useEISSN>0</useEISSN> <urgency/> <pubPubdateYear/> <pubPubdateMonth/> <pubPubdateDay/> <pubVolume/> <pubNumber/> <wireChannels/> <primaryCMSID/> <CMSIDs/> <keywords/> <seeAlsos/> <publications_g> <publicationData> <publicationCode>chph</publicationCode> <pubIssueName/> <pubArticleType/> <pubTopics/> <pubCategories/> <pubSections/> </publicationData> </publications_g> <publications> <term canonical="true">6</term> </publications> <sections> <term>53</term> <term canonical="true">39313</term> </sections> <topics> <term canonical="true">284</term> <term>188</term> <term>41038</term> </topics> <links> <link> <itemClass qcode="ninat:picture"/> <altRep contenttype="image/jpeg">images/2401297d.jpg</altRep> <description role="drol:caption">Dr. John R. Balmes</description> <description role="drol:credit">Neil Osterweil/MDedge News</description> </link> <link> <itemClass qcode="ninat:picture"/> <altRep contenttype="image/jpeg">images/2401297e.jpg</altRep> <description role="drol:caption">Dr. Meredith C. McCormack</description> <description role="drol:credit">Neil Osterweil/MDedge News</description> </link> </links> </header> <itemSet> <newsItem> <itemMeta> <itemRole>Main</itemRole> <itemClass>text</itemClass> <title>Debate on safety of gas stoves isn’t just hot air</title> <deck/> </itemMeta> <itemContent> <p><span class="dateline">SAN DIEGO </span>— While there is currently no smoking gun definitively showing that indoor nitrogen dioxide (NO<sub>2</sub>) concentrations from gas appliances are a cause of pulmonary diseases, the circumstantial evidence of the baleful effects of gas stoves on lung function is pretty compelling, said participants in a pro-con debate.</p> <p><span class="tag metaDescription">In what the moderator called “one of the most agreeable debates yet,” experts presented their views on the risks that cooking with natural gas pose on pulmonary health, and discussed ways for mitigating that harm.</span> The debate was held at the American Thoracic Society’s international conference.<br/><br/></p> <h2>PRO: Gas stoves cause lung disease</h2> <p>Arguing for the “pro” side, John R. Balmes, MD of the University of California, San Francisco, and a physician member of the California Air Resources Board, began by admitting that “I would never have said gas stoves cause lung disease, but that’s what they assigned me.”<br/><br/>Gamely proceeding anyway, Dr. Balmes noted that natural gas — methane — is a potent greenhouse gas, and that cooking with natural gas leads to generation of NO<sub>2</sub> with high peak concentrations in the home, especially in the kitchen, but in other rooms as well.[[{"fid":"301514","view_mode":"medstat_image_flush_right","fields":{"format":"medstat_image_flush_right","field_file_image_alt_text[und][0][value]":"","field_file_image_credit[und][0][value]":"Neil Osterweil/MDedge News","field_file_image_caption[und][0][value]":"Dr. John R. Balmes"},"type":"media","attributes":{"class":"media-element file-medstat_image_flush_right"}}]]<br/><br/>“We know that NO<sub>2</sub> is an irritant gas that can cause bronchoconstriction, airway hyperresponsiveness and inflammation, and there’s increased risk of asthma and COPD exacerbations,” he said.<br/><br/>The US Environmental Protection Agency (EPA) outdoor ambient air standard for NO<sub>2</sub> is 100 parts per billion (ppb) or lower, which are the levels needed to prevent asthma exacerbations. In separate meta-analyses there was a 1.05 rise in asthma incidence per every 2 ppb of NO<sub>2</sub>, and an increase of 1.07 in COPD incidence for every 5 ppb of NO<sub>2</sub>, Dr. Balmes noted.<br/><br/>The respiratory effects of gas stoves were revealed in a <span class="Hyperlink"><a href="https://pubmed.ncbi.nlm.nih.gov/23962958/">2013 meta-analysis</a></span> of 10 studies from North America and Europe, which showed a pooled odds ratio for current asthma of 1.34. Building on these data, authors of a <span class="Hyperlink"><a href="https://www.mdpi.com/1660-4601/20/1/75">2022 paper</a></span> estimated that 13% of childhood asthma could be prevented by elimination gas cooking.<br/><br/>Although the causative link is missing, the evidence is abundant that natural gas isn’t good for anyone, he acknowledged.<br/><br/></p> <h2>Con: More evidence needed</h2> <p>Arguing for the “con” side of the question, Meredith C. McCormack, MD, MHS, professor of medicine in the pulmonary and critical care division at Johns Hopkins University in Baltimore, said that “more definitive evidence is needed to define whether gas stoves cause lung disease.”<br/><br/>But Dr. McCormack didn’t let the natural gas industry off the hook, noting that a <span class="Hyperlink"><a href="https://www.mdpi.com/1660-4601/20/1/75">systematic review and meta-analysis</a></span> of cooking with gas in high-, middle-, and low-income countries showed that domestic use of gas fuels vs. electric was associated with increased risk of asthma (1.11 overall), COPD (1.15), and pneumonia (1.26). [[{"fid":"301515","view_mode":"medstat_image_flush_right","fields":{"format":"medstat_image_flush_right","field_file_image_alt_text[und][0][value]":"Meredith C. 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McCormack"},"type":"media","attributes":{"class":"media-element file-medstat_image_flush_right"}}]]<br/><br/>The link between gas and risk of asthma was significant only for adults, however, and the data on the risks for COPD and for pneumonia or other respiratory infections came almost exclusively from low-income countries, she noted.<br/><br/>Despite the lack of evidence for a causative link, however, Dr. McCormack pointed to evidence that indoor NO<sub>2</sub> is an air pollutant that acts as a respiratory irritant, and that indoor NO<sub>2</sub> levels in homes with gas stoves have been shown to be more than twice as high as those in homes with electric stoves. <br/><br/>Other evidence shows that indoor NO<sub>2</sub> is associated with increased symptoms and use of rescue medications for children with asthma, and with shortness of breath, nocturnal symptoms, reduction in lung function, and exacerbations in COPD.<br/><br/>Still other studies have shown that exchanging a gas stove for an electric stove can reduce NO<sub>2</sub> concentrations in the home by up to 50%, but there is still a need for clinical trial evidence of a health benefit for such an exchange, she said.<br/><br/>And even if a gas stove is swapped out for an electric or induction range, household members with asthma are exposed to other hazards, including second-hand smoke, cooking exhaust, candle or incense burning, outdoor particulate matter that finds its way indoors, mold, and mouse or cockroach allergens, she noted.<br/><br/></p> <h2>On common ground</h2> <p>Environmental interventions that can benefit all members of a household — not just those with obstructive pulmonary disease — include smoking cessation, charcoal filter-equipped air cleaners, stove hoods that vent outdoors, integrated pest management, hypoallergenic pillow and mattress covers, high efficiency particulate air (HEPA) vacuums, and mold and radon abatement. <br/><br/>Both Dr. Balmes and Dr. McCormack agreed in the end that gas stoves contribute to respiratory morbidity, and that both state and national policy changes are needed to support transition to cleaner indoor air, with financial incentives available for households with more modest incomes.<br/><br/>“For everyone, there is a climate-change mitigation imperative to transition away from gas appliances if we want to tackle the climate emergency,” Dr. Balmes said.<br/><br/></p> <h2>End indoor combustion</h2> <p>George D. Thurston, ScD, professor of medicine and population health at the NYU Grossman School of Medicine, who attended the debate, told <em>Chest Physician</em> that the participants talked about NO<sub>2</sub> but didn’t touch on particulate pollution generated by gas stoves.<br/><br/>Burning natural gas produces particles that are very similar in composition to those produced by burning coal, oil, or diesel fuel, Dr. Thurston said, and he pointed out that interventions such as range hoods work only if they actually vent outdoors, and aren’t simply fans that recirculate the air within the home. And even when ventilation works as it should to move air out of the house, it only pumps it back into the atmosphere, where it contributes to climate change.<br/><br/>“We need combustion-free homes. That’s the unifying principle. We have to keep our eyes on that prize,” he said.<br/><br/>Dr. Balmes, Dr. McCormack, and Dr. Thurston all reported having no relevant disclosures.</p> </itemContent> </newsItem> <newsItem> <itemMeta> <itemRole>teaser</itemRole> <itemClass>text</itemClass> <title/> <deck/> </itemMeta> <itemContent> </itemContent> </newsItem> </itemSet></root>
FROM ATS 2024
