Erin Davis/Axios Visuals Air quality is worsening in the Upper Midwest and Northern California, according to year-over-year data. Why it matters: Poor air quality can lead to long-term health problems ...

Flood control along the Mississippi River is a central piece of a newly passed federal law — work that advocates believe is ...

The Water Resources Development Act was signed into law on Jan. 4 and includes studies on increased flooding in the upper Mississippi basin.

Flood control along the Mississippi River is a central piece of a newly passed federal law — work that advocates believe is critical.

Over the objections of Iowa state officials, federal regulators will require plans to confront heavy nitrate concentrations ...