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Climate pollution from inhalers has the impact of half a million cars per year, study finds

Inhalers using hydrofluoroalkane propellants generate 24.9 million metric tons of CO2 annually, equal to emissions from 530,000 cars, highlighting a significant climate impact.

  • Inhalers for asthma and COPD generate over 2 million metric tons of carbon emissions annually, equivalent to the emissions of roughly 530,000 gas-powered cars.
  • Metered-Dose inhalers containing hydrofluoroalkane propellants account for 98% of inhaler emissions over the past decade, trapping heat in the atmosphere thousands of times more powerfully than carbon dioxide.
  • The US Veterans Administration has prioritized dry-powder inhalers over traditional versions with propellants, reducing planet-warming gases by over 68% from 2008 to 2023.
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Pollution from inhalers has the impact of half a million cars per year, study finds

"They are these tiny little products, and it's hard to imagine that they can be such contributors, but it's an eminently fixable problem," a study co-author said.

·Plattsburgh, United States
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Phys.org broke the news in United Kingdom on Monday, October 6, 2025.
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