Wildfire Smoke Now Bigger Prenatal Threat Than Human Sources of Air Pollution The environmental movement has celebrated significant gains since the Clean Air Act was signed into law in 1970.
Emissions from vehicles and industrial sources have plummeted by nearly 80 percent over the past five decades, a trend that appears to be rapidly reversing due to wildfire smoke.
Research from the University of Maryland, College Park, paints a dire picture for vulnerable populations, particularly babies in utero.