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Ozone Layer Protection

  • Ozone Science

    Learn about the science behind the ozone layer, ozone depletion, and health impacts of ozone loss.

  • Regulations Under Title VI of the Clean Air Act

    Learn about how EPA regulates ozone-depleting substances under the Clean Air Act.

  • Regulating HFCs under the AIM Act

    EPA is managing a phasedown of hydrofluorocarbons (HFCs), a class of chemicals used as substitutes for ozone-depleting substances, under the AIM Act. Learn more about HFC reduction.

The stratospheric ozone layer is Earth’s “sunscreen” – protecting living things from too much ultraviolet radiation from the sun. The emission of human-made ozone-depleting substances, commonly used in refrigeration and air conditioning, foam products, aerosols, solvents, and for fire suppression, has been damaging the ozone layer. But through domestic and international action to phaseout these substances, the ozone layer is healing and should fully recover by about 2065. This website addresses stratospheric ozone issues, including the science of ozone depletion, EPA's regulatory approach to protecting the ozone layer, and international action establishing a global framework for ozone layer protection.

  • Background and Science

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    Learn about the science behind the ozone layer, ozone depletion, and health impacts of ozone loss.

    Explore Ozone Science
  • Regulatory Programs Under the Clean Air Act

    a series of arrows descending from top left ot bottom right of the image over a series of stock-related graphs and a world map

    Learn about how EPA regulates ozone-depleting substances under the Clean Air Act.

    See Regulatory Programs
  • Related Actions and Programs

    Learn about related voluntary, educational, and outreach programs, as well as programs to address HFCs, commonly used substitutes for ODS.

    See Related Programs
  • International Action

    an image of Earth seen from space showing arrows and node overlaid on top of its surface

    Learn about international agreements to protect the ozone layer.

    See International Action
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Last updated on April 7, 2025
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