On September 4, 2017, smoke from Western wildfires entered the gulfstream and spread across the country. Image: NASA Earth Observatory / Suomi NPP
2017 was a smoky year for the United States. In September, the haze was visible from space, appearing as a smear obscuring almost half of the country.
What's new: Climate change is increasing the length and severity of our fire seasons, and scientists are starting to quantify the health impacts of all that smoke. In a poster presented Wednesday at the fall meeting of the American Geophysical Union (AGU), Colorado State University atmospheric scientist Jeffrey Pierce estimated about 15% of the roughly 200,000 air quality related deaths in 2000 were caused by wildfire smoke. By 2100, he estimates it could reach 40%. That's just one model (some predict even more extreme fire seasons, some less) but it's clear that smoke poses a real and serious health risk.