After the LA fires, scientists study the toxic hazards left behind

Nicole Byrne, a concerned mother of two preschoolers, has been tirelessly tracking air quality in her Pasadena home near the Altadena wildfire, where she knows direct exposure to toxic pollutants is possible but not from her location. As part of an innovative study led by top universities, including Harvard and UCLA researchers, Byrne is providing crucial data for real-time health monitoring in Los Angeles, despite the U.S. Army Corps of Engineers' decision to halt soil sampling after the fires.