"The federal government should ban the use of lead weights, those fingertip-size chunks of metal that balance the tires of cars and trucks, says a petition filed with the U.S. Environmental Protection Agency last week."

"Camp Lejeune, a sprawling Marine base on the North Carolina seaboard, is the site of what some scientists call the worst public drinking-water contamination in the nation's history."

The flame-retardant chemicals known as PBDEs are virtually ubiquitous in U.S. waters. New research shows that when PBDEs are exposed to wastewater treatment, they can generate dioxins.

"U.S. government and university scientists are partnering to form a new cooperative institute that will use satellite observations to detect, monitor and forecast climate change and its impact on the environment."

A power struggle has erupted over a North Carolina river.

Touring the Everglades by airboat, Interior Secretary Salazar promised more federal funds to restore them.

Agriculture Secretary Vilsack took personal control over logging and road projects on tens of millions of acres of National Forest in a temporary effort to resolve controversy over the "Roadless Rule."

Congress decision, under pressure from the gun lobby, to allow loaded, concealed weapons in National Parks creates problems for rangers trying to keep people safe.

"Researchers find climate change is already having a 'sometimes hidden and often unequal' impact on minorities and poor in the United States."

Energy Secretary Chu and CA Gov. Schwarzenegger today will dedicate the National Ignition Facility, a mammoth laser device designed to explore fusion energy.

American shad are struggling with little success to make a comeback in Virginia's James River. Historically abundant, this "founding fish" disappeared for years because its spawning was blocked by dams.

A BioBlitz is a kind of whirlwind count of all the species in a specific place. The Park Service has been co-sponsoring BioBlitzes with National Geographic.

A draft bill from the House Natural Resources Committee would drastically reform the Interior Department's corruption-plagued system for collecting oil and gas royalties.

Private well water should be tested yearly, two major scientific bodies say -- sometimes more often when kids are drinking it.

Environmental groups seem to like President Obama's pick for the Supreme Court, Sonia Sotomayor.