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The Clean Air Act has helped reduce pollution in many parts of the United States, but progress has been unevenly distributed, leaving many communities still breathing unhealthy air. Too much of this ongoing pollution comes from power plants, refineries, and other facilities that still do not have up-to-date pollution controls. Neighborhoods inhale the exhaust from petrochemical plants that results from frequent accidents and poor maintenance procedures. And the air near huge animal feeding operations that warehouse thousands of animals is nearly unbreathable.
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