This month, conservationists in the Czech Republic and Kenya launched an audacious bid to save one of the world's rarest animals: the northern white rhinoceros. Four of the last eight known northern whites in the world, two male and two female, were packed into wooden crates and sent from a Czech zoo to Kenya, where scientists hope they will get down to the business of breeding.

The C$16.2 billion ($15.4 billion) Mackenzie pipeline in Canada's Arctic should be allowed to proceed, provided 176 recommendations aimed at securing socioeconomic benefits and minimizing environmental damage are followed, regulators ruled on Wednesday. In a much-anticipated report, the Joint Review Panel said it believed the huge gas project would bring overall benefits to Canada's Northwest Territories and avoid major ecological impact if the oil companies proposing the line and governments follow its list of measures.

Brazil's President introduced national legislation that will guide efforts to reduce projected emissions by 36.1 to 38.9 percent by 2020. This legislation comes on the heels of the COP-15 climate change conference held in Copenhagen earlier this month, and demonstrates Brazilâ??s eagerness to make significant and immediate progress against global climate change.

Six months after state health officials declared their investigation of cancer rates in south suburban Crestwood was almost complete, they have yet to release the results.

Gov. David Paterson and the state Department of Environmental Conservation are being deluged with last-minute lobbying over a document that will set guidelines for natural gas drilling for years to come.

Regulators in West Virginia and other states are overwhelmed as they try to keep tabs on the nation's nearly one million active oil and gas wells, a number that's likely to climb as the feverish growth in natural gas exploration continues.

California scientists hope studying 180 black mussels pried from algae-covered rocks in San Francisco Bay will provide clues into how many drugs and chemicals are polluting waters across the nation.

The U.S. Food and Drug Administration will miss its third self-imposed deadline on letting consumers know whether it is safe to use products made with bisphenol A, a chemical ingredient in the lining of most food and beverage cans.

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New York environmental regulators this week released a plan to protect aquatic life in the state's rivers that could cost power generators billions to upgrade their facilities. The plan, which still needs final approval, would affect most of the state's six nuclear power plants and several facilities powered by fossil fuels that use water for cooling. The state Department of Environmental Conservation (DEC) wants the facilities to recycle and reuse the water in a closed-cycle cooling system rather than discharging the heated water into rivers.