The Biden administration is proposing lower limits for a deadly air pollutant, saying tougher standards for soot from tailpipes, smokestacks and wildfires could prevent thousands of premature deaths a year.
A proposal released this morning by the Environmental Protection Agency would set maximum levels of 9 to 10 micrograms of fine particle pollution per cubic meter of air, down from 12 micrograms set a decade ago. Read more.
