Conservationists called the 13-nation agreement an important step in protecting the wild cats, whose numbers have plummeted in recent decades as human encroachment has eliminated more than nine-tenths of their habitat. Experts say there are fewer than 3,500 wild tigers today, compared to an estimated 100,000 at the beginning of the 20th century. Hailing the agreement, Michael Baltzer, head of the WWF Tiger Initiative, said "There never has been a high-level government commitment to take forward tiger conservation."

"Some companies will pay you money for that old cellphone or iPod."

A frightened, shivering dog was rescued after floating 75 miles (120 kilometers) on an ice floe down Poland's Vistula River and into the Baltic Sea, officials said Thursday.

"The 2000-2009 decade was the warmest on record, easily surpassing the previous hottest decade - the 1990s - U.S. government researchers report."

"Today, Target became the first major US retailer to stop selling farmed salmon products! Salmon consumption in the United States is a huge market for retailers. Aquaculture (farming fish) is often called the future of the seafood industry, but some types of aquaculture - such as conventional open-net salmon farming - can cause tremendous damage to the environment. Parasite infestations, concentrated fish waste, the uncontrolled spread of genetic material, and the unsustainable use of wild fish to feed farmed animals all pose significant threats to the sanctity of our marine ecosystems."

"Tigers in the Greater Mekong region are facing extinction, their numbers down more than 70 percent in slightly more than a decade due to poachers and habitat destruction."

"In an interview, Bill Gates tells CNET's Ina Fried that the poor need a carbon-neutral energy source even more than the rich, as they are feeling the brunt of high energy prices and the effects of climate change."

"Great news coming out of Beijing: The horrific air pollution there has inspired the local government to implement a slew of great reforms and initiatives to get people out of their cars, and onto their bikes. Biking in China is back!"

A Tiger raising piglets?

"The U.Va. research, just published in the journal Environmental Science & Technology, demonstrates that algae production consumes more energy, has higher greenhouse gas emissions and uses more water than other biofuel sources, such as switchgrass, canola and corn."

"Negotiators at the COP15 conference in Copenhagen didn't see eye to eye on much last month, but almost everyone agreed on one thing: To protect the planet we need to save its forests."

A team of 20 top climbers plan to penetrate Mt. Everest's so-called "death zone" to try and clear detritus left by decades of climbers.

Concerns grow over dramatic drop in numbers of mysterious creatures that migrate across the Atlantic

The U.S Fish & Wildlife Service wants to ban the importation of Burmese pythons, and eight other large constrictor snakes that threaten the Everglades.

"Apparently bees' immune systems are healthier when they are fed pollen from a wider variety of plants than when they eat only one thing."

"Our ecological footprint - what we take out of the planet - is now 1.3 times the biological capacity of the Earth. In the words of Professor Bob Watson, Defra's chief scientific adviser and former chairman of the Intergovernmental Panel on Climate Change (IPCC), we are in danger of approaching "a point of no return". So the action we take in the... See More next couple of decades will determine whether the stable environment on which human civilization has depended since the last Ice Age 10,000 years ago will continue. "

A new species of bird, the spectacled flowerpecker, has been spotted in the rainforests of Borneo.