Wildland firefighting has long been recognized as dangerous, dirty work. Now, there is growing evidence that it can also cause serious long-term health problems. Chronicle reporter Julie Johnson spent six months investigating the impacts of wildfire smoke on firefighters, and spoke to a dozen men and women diagnosed with grave diseases who all suspect that smoke was a factor. She tells host Cecilia Lei that for decades fire agencies have struggled to provide meaningful protection for their workers, but that progress could be coming. | Unlimited Chronicle access: sfchronicle.com/pod Got a tip, comment, question? Email us: fifth@sfchronicle.com Learn more about your ad choices. Visit megaphone.fm/adchoices