U.S. EPA said today that it will reconsider a Bush-administration memorandum describing why the government should not regulate carbon dioxide emissions from new coal-fired power plants. In a letter to the Sierra Club, EPA Administrator Lisa Jackson said the agency would grant the advocacy group's petition seeking reconsideration of former Administrator Stephen Johnson's memo.

NEW YORK -- The great global cola war has spilled into a new theater of operations: the environment. Hardly a week passes without the two soft-drink behemoths, the Coca-Cola Co. and PepsiCo, announcing new environmental initiatives. Both have launched ambitious water-conservation and recycling drives, and the two are now working feverishly to improve their energy efficiency. Most of what they do saves them money and bolsters their bottom lines. But a recent barrage of press releases from both touting small-scale efforts in single bottling plants and massive global initiatives suggests Coke and Pepsi are engaged in combat over which will wear the "greenest beverage company" crown.

This year will be a big one for determining a time frame for commercial development of large-scale carbon capture and sequestration, or CCS, a technology many policymakers say is vital to curbing emissions from coal-fired power plants, a new report finds.

A $245 million partnership between the United States and Canada could create North America's first large-scale project for storing greenhouse gases.

Arizona Gov. Jan Brewer (R) said she may rescind the state's new "clean-car" regulations that were championed last year by then-Gov. Janet Napolitano (D).

Federal wildlife officials today agreed to consider the American pika -- a rabbit-like mammal whose mountain habitat is changing thanks to global warming -- for protection under the Endangered Species Act, according to an environmental group that sued to initiate a review.

Partisan battle lines emerged in the House Energy and Environment Subcommittee today as the new panel held the first in a series of hearings on sweeping energy and climate legislation slated for markup before Memorial Day.

Scientists would have to achieve Nobel-level breakthroughs in electric batteries, solar power and the development of new crops for fuel to solve the world's energy and environment problems, Energy Secretary Steven Chu said.