EPA proposes new rule to crack down on deadly air pollution

For the first time since 2012, the US Environmental Protection Agency is proposing an update to the federal air quality standard for fine soot — a long-awaited step to reduce deadly air pollution.

​For the first time since 2012, the US Environmental Protection Agency is proposing an update to the federal air quality standard for fine soot — a long-awaited step to reduce deadly air pollution.