"Just as wars over oil played a major role in 20th-century history, a new book makes a convincing case that many 21st-century conflicts will be fought over water."

"To quote a famous line from a famous movie, "It's the only thing that lasts" — land, that is. No wonder, then, that many see land as their legacy, something to pass down to future generations when they die. A landowner in Michigan wants to use death itself — her own — to leave a legacy that's unusually personal."

"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."

"The Harper government is quietly reviewing the $1.9-billion investment by a state-owned Chinese oil company in two oilsands projects, more than a month after the deal was originally supposed to close."

"A coalition of former governors, congressmen, scientists and others sent the Obama Administration their proposed Chesapeake Bay restoration strategy, a plan much tougher than the one being developed by the U.S. Environmental Protection Agency."

Dust is everywhere, is likely to increase, and will cause unknown environmental impacts.

"Environmental groups gathered along the Delaware River Wednesday to call on the Delaware River Basin Commission to protect the Delaware from toxic chemical contamination related to natural gas drilling."

"The Obama administration announced Wednesday it might write rules to limit the manufacture, processing and use of C8 and related perfluorinated chemicals, but would not propose any such regulations until at least 2012."

"To ensure that the most vulnerable Americans are better protected from exposure to lead, the U.S. EPA is proposing to revise the monitoring requirements for measuring airborne lead."

"Anywhere that people can go online they can trace the proposals and plans of countries to combat climate change through an online climate pledge tracker website newly established by the United Nations Environment Programme."

"The federal Environmental Protection Agency told New York State on Wednesday that it had major concerns about how proposed hydraulic drilling for natural gas would affect public health and the environment, and urged it to undertake a broader study of the potential impact."

"A beef industry group has challenged a ruling by U.S. environmental regulators that greenhouse gas emissions endanger human health, saying the move would hurt agriculture."

"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."

"A controversial roundup of 2,500 wild horses from public and private lands in Nevada began on Monday amid protests from activists who call it needless and inhumane."

"Earth's various ecosystems, with all their plants and animals, will need to shift about a quarter-mile per year on average to keep pace with global climate change, scientists said in a study released on Wednesday."