This month: the toll of human-caused wildfires, rescuing snakes to prevent human-animal conflict, and capturing the impacts of an ambient killer. Transcript and individual segments available at https://undark.org/article/podcast-30-wildfires-snakes-air-pollution Update: An earlier version of this podcast and transcript provided an incorrect description of PM2.5, a scientific and regulatory term referring to fine particulate matter that is 2.5 micrometers or smaller in diameter. Although particulate pollution larger than 2.5 micrometers is generally considered less hazardous, it is still a public health concern. There is also no meaningful lower threshold for particulate pollution below 2.5 micrometers that can be considered safe.