"A Canadian firm says U.S. use of defoliants in Vietnam has left perilous dioxin levels, but that the issue is solvable."

"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."

"A team of international scientists has made a major breakthrough in the fight to save tasmanian devils from extinction."

"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."

"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 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."

"One environmental leader says if we keep doing what we're doing, the world will continue on a path toward economic decline and eventual collapse."

"Quebec will become the first province in Canada to adopt California's strict auto emissions standards, the province's environment ministry said on Tuesday."

"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."

"Here's an opportunity to wisely spend some of the $100 billion that Secretary of State Hillary Clinton promised at Copenhagen to cut the greenhouse gases of developing nations by aiding in the development of renewable energy infrastructure to by-pass fossil fuel dependence."

"China on Friday defended the role played by premier Wen Jiabao at climate change talks in Copenhagen this month after a barrage of international criticism blaming China for obstructing negotiations."

"The top U.N. climate official said Wednesday that though the Copenhagen global warming summit went sour, countries should avoid blaming each other and get down to work on a better deal next year."

When plants are eaten -- especially by insects -- they emit a number of signals that might be seen as howls of alarm, and exhibit responses seemingly meant to stop the carnage. Whether or not this troubles vegans, it fascinates scientists.

The first case of Marburg virus, a deadly relative of Ebola, has been reported in North America. A Colorado traveler brought it home after contact with bats in a cave in Uganda.

"OTTAWA -- Half of the children's jewelry items tested at the government's product safety laboratory last year were made of almost pure lead."