Terry and Sandy Gupton are worried for the health of both their cattle and themselves. They live near the stretch of the Emory River clogged with coal ash sludge from a Dec. 22, 2008, spill from a TVA plant.

"Canadian National Railway pleaded guilty on Monday to polluting Canada's wilderness in two train derailments, one of them resulting in the largest inland oil spill in Canada's history."

UN Secretary-General Ban Ki-moon told a meeting of business leaders in Copenhagen that "climate change is the defining challenge of our time."

Scientists in the Houston area are focusing research on the flare stacks at its hundreds of petrochemical plants -- which may be a major overlooked cause of smog.

"Rows of tall turbines have already remade the landscape on wheat farms and ridgelines on private land around the region. But so far there have been no wind farms built on public land in the Northwest. That's about to change."

The push for greener cars will likely bring a boom for companies that mine and refine lithium -- a key ingredient in batteries.

The Indianapolis Speedway, site of yesterdays Indy 500, mounts a major effort to be environmentally friendly.

House Majority Leader Steny Hoyer (D-MD) said he expected the eight committees with partial jurisdiction over the new House climate bill to act swiftly.

Wisconsin's landmark out-of-basin diversion of the Great Lakes is getting both praised and blasted by water watchers.

U.N. Secretary-General Ban Ki-moon said the climate bill approved Thursday by the House Energy Committee is 'not enough' to stem warming to the degree hoped for in the next climate treaty.

From a design award-winner to a model that uses the updraft on a roof,
small residential wind turbines are getting smarter and sexier.

"OSLO -- A rise in concentrations of a powerful greenhouse gas over the Arctic after a decade of stability is stirring worries about a possible thaw of vast stores trapped in permafrost, experts said."

Zebra mussels, which have caused an estimated $5 billion in damage to the Great Lakes, have been found in a Maryland tributary of Chesapeake Bay. If they spread, they could threaten the less-salty waters of the Bay.

"It's an old energy problem with a new solution: After decades of facing prohibitively high costs to install solar panels, Massachusetts residents will be able to lease the panels for a tiny fraction of their upfront cost."

"The Michigan Legislature may soon create a fund to loan schools money to build windmills, solar panels or other sources of alternative energy."