Smoke from Canadian wildfires has carried another day of poor air quality south of the border to the American Midwest. Conditions in parts of Minnesota, Wisconsin and Michigan were rated "very unhealthy" on Tuesday.

Flint, Michigan, is nearly finished replacing lead pipes 11 years after the water crisis. Financial struggles still cloud the water system's future.

Each summer, Lake Erie is plagued by toxic cyanobacterial blooms fed by phosphorus runoff from farm fields. Michigan is struggling to reduce the pollution by 40%.

President Donald Trump signed an executive order designed to “rebuild public trust in science.” But scientific groups claim the new administration is having the opposite effect.

The U.S. Army Corps of Engineers finds construction could result in permanent loss of wetlands and bat habitat, disturb aquatic wildlife, and degrade roads. But it would eliminate the chance of an anchor strike.

There’s tons of documentation on the plume’s legal, technical and local history, but finding answers to big-picture questions can be difficult. Here's what I've learned after 18 months of research.

The U.S. Supreme court wants lower courts and agencies to restrict the kinds of environmental issues should be used in permitting infrastructure.

The Great Lakes Water Quality Agreement needs to be updated to address the urgent issue of microplastic pollution. Scientists suspect high levels of microplastics in the Great Lakes because they are landlocked, and closer to people, which are the main source of plastic pollution.

Roundup is widely used on U.S. farms, despite lawsuits, health warnings, and billions in payouts over cancer claims. Circle of Blue Senior Editor and Chief Correspondent Keith Schneider weighs in on the science, politics, and future of glyphosate in Michigan’s agriculture under the Trump administration.

Locals have been pushing for more aggressive solutions to the Gelman plume, but the company isn't required to fully clean it up. EPA intervention could change that — if it survives Trump 2.0.