Key moments from George H.W. Bush’s legacy

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The changes were made to address four major threats, posed by cars, factories, and the like, to the environment: acid rain, urban air pollution, toxic air emissions, and stratospheric ozone depletion.

For example, one of the provisions stipulates the gradual phaseout of chemicals that damages the earth’s ozone layer. The amendments also included measures that would ensure greater enforcement of the Act.

Source: EPA and EPA

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