State health officials appear to have deviated from the usual response during an outbreak after it killed two infants.

Regulations make it hard to introduce organisms that quash invasive species. Some experts see missed opportunities.

A longstanding push for urgent action on environmental toxins is landing in an unprecedented time in American politics.

Some experts believe CKD is the first chronic illness directly linked to climate change. Prevention may be possible.

The explosion of populations east of the Mississippi was made possible by logging and the slaughter of wolves.