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Killer whales are the most toxic mammals in the Arctic, riddled with household chemicals from around the world, the environmental pressure group WWF said on Monday. Scientists found that the blubber of killer whales, or Orcas, taken from a fjord in Arctic Norway was full of polychlorinated biphenyls (PCBs), pesticides and even a flame retardent often used on carpets.

Canada's forestry industry has sharply reduced its greenhouse gas emissions over the last 15 years, largely by employing new technologies, according to the Forest Products Association of Canada.

A national strategy was adopted in Yaounde over the weekend.

Forestry researchers will start experimental releases of an introduced insect soon, which they hope will curb rampant growth of an ornamental plant that's threatening pine plantations. Like many plant pests, Buddlea was brought here as a garden specimen, grown for its striking purple flowers.

Kevin Brown's most feared opponent on the sandlot or basketball court while he was growing up wasn't another kid. It was the polluted air he breathed. "I would look outside and I would see him just leaning on a tree or leaning over a pole, gasping, gasping, trying to get some breath so he could go back to playing," recalls his mother, Lana Brown.

Forest dwellers engaged in a 700-km-long march from Chiang Mai arrived in Bangkok yesterday and are now taking a much-needed rest in a public park near Chatuchak market. Prue Odochao, a Karen villager from Chiang Mai's Samoeng district, was the only one to have not made it. Mr Prue, 34, could only make it to Chai Nat province yesterday, about 200km north of Bangkok.

For first-time visitors, finding Kevin Flynn's house in the Santa Cruz Mountains takes detailed instructions, an eagle eye for weathered signposts and, often, a plaintive last-minute cell-phone call from the road.

Southwest Oregon's Rogue River-Siskiyou National Forest has become the latest national forest to turn away from cutting storied old-growth trees, moving instead toward less-controversial thinning of crowded younger stands.