Primary standards that were established in the 1970s CAA are concerned with

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Primary standards established in the 1970s Clean Air Act were concerned with levels of pollution that threaten the public health. These standards aimed to regulate the levels of six specific pollutants, including carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter and sulfur dioxide, to levels that would not cause harm to human health.

Primary Standards That Were Established in the 1970s CAA Are