How wildfire smoke is erasing years of progress toward cleaning up America’s air
Oregon Public Broadcasting,
Smoky haze from wildfires in Canada obscures New York City's Empire State Building this year.
Smoky haze from wildfires in Canada obscures New York City's Empire State Building this year.
in obscures this year. The air in the U.S. has improved over the past 50 years, but smoke pollution from growing wildfires…
Over the last few decades, air in the U.S. has undergone a remarkable transformation: pollution levels of health-damaging tiny…
Smoky haze from wildfires in Canada obscures New York City’s Empire State Building this year.