Christmas trees are one of the latest items to join the list of consumables that Americans scrutinize for environmental, economic, and political correctness.
There's an expanding rift between developed and developing countries over whether to extend the 1997 Kyoto Protocol goals for reducing greenhouse gas emissions beyond the 2012 limits.
The two-week negotiations begin on Monday and carry far lower expectations than did last December's climate change talks in Copenhagen.
A new energy revolution – similar to shifts from wood to coal to oil – is inevitable as climate change and oil scarcity drive a global search for sustainability in power production. But even the promise of renewable energy holds drawbacks.
Biodiversity researchers warn that 20 percent of vertebrate species are threatened with extinction, largely because of human damage to habitats. But conservation efforts, they say, are effective.
The population of Florida panthers has increased from 25 adults in 1995 to 100 today thanks to human intervention. But without continued intervention, the species will become extinct.
Jonathan Franzen’s latest is already the year’s biggest novel.
Negotiators seeking to lay the groundwork for a global warming summit in Mexico in November appear to be moving further from consensus.
Retired U.S. National Park Service workers formed Global Parks to share their expertise abroad.