"New research shows that killer whales are inhaling bacteria, fungi and viruses once believed to be found only on land. Some of the pathogens are highly virulent. And some are even antibiotic-resistant."

"To the untrained eye, a weed is just a weed, and few of us can tell a thistle from a teasel. But for Paul Heiple and his team of Weed Warriors, knowing the difference is essential to their work routing out invasive plants that threaten the native species at Edgewood Park, a 500-acre natural preserve that overlooks California’s Silicon Valley."

"A coalition of more than 2,000 U.S. farmers and food companies said Wednesday it is taking legal action to force government regulators to analyze potential problems with proposed biotech crops and the weed-killing chemicals to be sprayed over them."

"SEATTLE -- Polar bears are skating on thin ice in Alaska these days: Warming temperatures have resulted in dramatic shrinkage of sea ice, leaving the bears with fewer ice floes on which to rest and hunt seals. But at least for the moment, the Endangered Species Act won't be used to control the greenhouse gas emissions that conservationists say are contributing to climate change and posing one of the biggest threats to the bears' survival."

"A major new study has quashed fears that onshore windfarms are causing long-term damage to bird populations, but found new evidence that some species are harmed when windfarms are built."

"Scientists find that all 93 strains of bacteria collected from deep inside Lechuguilla Cave at Carlsbad Caverns in New Mexico are already resistant to at least one of the antibiotics we use to fight infections."

"Old swaths of Appalachian forest land left barren by decades of coal mining may find their past is their future, if efforts to restore the American chestnut tree in reclaimed coal fields are successful."

"CORVALLIS, Ore. -- Across the Northern Hemisphere, populations of moose, deer, and other large herbivores now far exceed their historic levels and are disrupting ecosystems, finds a new survey on the loss of large predators, particularly wolves."

"Over half of 2 million frogs imported to Bay Area annually carry disease that endangers local amphibians."