Ozone and particulate matter air pollutants cause over 100,000 premature deaths per year and affect the health of millions of Americans. EPA Administrator Lee Zeldin said last month that his agency would stop considering those costs when drafting new regulations.

By Lisa Sorg

Senate Democrats have launched an investigation into the U.S. Environmental Protection Agency’s decision in January to disregard human health impacts when calculating the costs and benefits of regulating the harmful air pollutants ozone and PM2.5.

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