At the American Geophysical Union conference this week, MuckRock and The California Newsroom presented findings and methodology from the “Smoked Screened” investigation.

Dozens of states and the EPA are so concerned they may exclude the smokiest days from the legally binding score cards that determine whether they’re doing enough to fight pollution, according to a joint collaboration between the Tribune and the nonprofit news site MuckRock. Now some states are considering banding together in a joint effort that could trigger the largest exclusion in the history of the federal Clean Air Act

Lakes and streams in August A. Busch Memorial Conservation Area were contaminated with uranium from refining efforts in Weldon Spring.

Everyone agrees it’s time to change the Clean Air act’s exceptional events rule, but has different solutions.

Across the US, local governments, lobbyists and industry have spent millions to get wildfire pollution excluded from the record. People like Robert Shobe pay the price.