Many people make two assumptions about wood smoke pollution in West Marin: first, that the problem isn’t significant, and second, that E.P.A.-certified wood stoves don’t pollute. Both assumptions are incorrect. Additionally, many people do not know how much wood smoke pollution affects human health and the environment.
Data from the Bay Area Air Quality Management District shows that particle matter, or PM, concentrations in the San Geronimo Valley can be up to two times greater…