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• High Emissions Finding: A new study found that inhalers used for conditions like asthma and COPD generate an estimated 24.9 million metric tons of carbon dioxide equivalent emissions in the U.S. over a decade (2014–2024).
• Emissions Equivalence: This total pollution is comparable to the annual emissions of approximately 530,000 gas-powered cars.
• Source of the Problem: The environmental harm comes not from the medication itself, but from the hydrofluoroalkane (HFA) propellants used in metered-dose inhalers (MDIs). MDIs account for 98% of the total inhaler emissions.
• Vicious Cycle: The study authors noted that these emissions contribute to global warming, which in turn worsens air pollution, potentially exacerbating the very respiratory conditions the inhalers are meant to treat.
• Lower-Emission Alternatives Exist: Researchers highlight that alternatives, such as dry powder inhalers (DPIs) and soft mist inhalers, are available and deliver medication without needing the potent greenhouse gas propellants.
• Call for Change: Experts state there is a “tremendous opportunity” to protect both patients and the planet by transitioning to these lower-emission alternatives within the healthcare system.