The name for a family of commercial chemicals usually provides a fairly clear idea of the related compounds within it. An example is organophosphate pesticides. Another is brominated flame retardants.

Proposed changes to the federal definition of “waters of the United States” could strip protections from millions of wetlands.

What does federal cannabis legalization mean to you? I recently asked this question on social media. Most responses acknowledged cannabis’ status as a Schedule I substance under the federal Controlled ...