Environment

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A woman with symptoms of cholera receives treatment at a hospital run by Doctors Without Borders in Port-au-Prince, Haiti, Monday, Nov. 22, 2010. Haiti will hold elections on Nov. 28 in the midst of a month-old cholera epidemic that has killed at least 1,000 people and hospitalized thousands. (AP Photo/Ramon Espinosa)

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A woman with symptoms of cholera receives treatment at hospital run by Doctors Without Borders in Port-au-Prince, Haiti, Monday, Nov. 22, 2010. Haiti will hold elections on Nov. 28 in the midst of a month-old cholera epidemic that has killed at least 1,000 people and hospitalized thousands. (AP Photo/Ramon Espinosa)

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UN peacekeepers from Brazil are seen through a window glass as they patrol on vehicles in Cap Haitian, Haiti, Monday, Nov. 22, 2010. It began as a rumor that farmers saw waste from a U.N. peacekeeping base flow into a river. Within days of the talk, hundreds downstream had died from cholera. (AP photo/Emilio Morenatti)

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Supporters of Haitian presidential candidate Michel Martelly blow cornets as they arrive for a a campaign rally in Cap Haitian, Haiti, Monday, Nov. 22, 2010. Haiti will hold presidential elections on Nov. 28. (AP photo/Emilio Morenatti)

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** FILE ** Iranian technicians work at the Bushehr nuclear power plant, outside the southern city of Bushehr, Iran, on Monday, Aug. 23, 2010. Iran's nuclear chief said on Tuesday Nov. 23, 2010, that a malicious computer worm known as Stuxnet had not harmed the country's atomic program and accused the West of trying to sabotage it. Iran earlier confirmed that Stuxnet had infected several personal laptops belonging to employees at the Bushehr plant but that plant systems were not affected. (AP Photo/International Iran Photo Agency, Ebrahim Norouzi)

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The shoes and belongings of Cambodians, who died in a stampede, cover a bridge in Phnom Penh, Cambodia, Tuesday, Nov. 23, 2010. Thousands of people celebrating a water festival on a small island in a Cambodian river stampeded Monday evening, killing over three hundred people, a hospital official said. Hundreds more were hurt as the crowd panicked and pushed over the bridge to the mainland. (AP Photo/Philip Heijmans)

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South Korean villagers watch smoke from South Korea's Yeonpyeong island near the border against North Korea Tuesday, Nov. 23, 2010. North Korea fired artillery barrages onto the South Korean island near their disputed border Tuesday, setting buildings alight and prompting South Korea to return fire and scramble fighter jets. (AP Photo/Yonhap)

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In this image take from TV footage, smoke rises from South Korea's Yeonpyeong island near the border against North Korea, Tuesday, Nov. 23, 2010. North Korea shot dozens of rounds of artillery onto the populated South Korean island near their disputed western border Tuesday, military officials said, setting buildings on fire and prompting South Korea to return fire and scramble fighter jets. (AP Photo/YTN via APTN)

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Houses are burned on South Korea's Yeonpyeong island near the border against North Korea, Tuesday, Nov. 23, 2010. North Korea shot dozens of rounds of artillery onto the populated South Korean island near their disputed western border Tuesday, military officials said, setting buildings on fire and prompting South Korea to return fire and scramble fighter jets. (AP Photo/Yonhap)

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In this image take from TV footage, flames lit up just after artillery hit an area of South Korea's Yeonpyeong island near the border against North Korea, Tuesday, Nov. 23, 2010. North Korea shot dozens of rounds of artillery onto the populated South Korean island near their disputed western border Tuesday, military officials said, setting buildings on fire and prompting South Korea to return fire and scramble fighter jets. (AP Photo/KBS via APTN)

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Smoke billow from Yeonpyeong island near the border against North Korea, in South Korea, Tuesday, Nov. 23, 2010. North Korea shot dozens of rounds of artillery onto the populated South Korean island near their disputed western border Tuesday, military officials said, setting buildings on fire and prompting South Korea to return fire and scramble fighter jets. (AP Photo/Yonhap)

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People read extra edition of a newpaper reporting that North Korea fired artillery onto a South Korean island, in Seoul, South Korea, Tuesday, Nov. 23, 2010. North Korea bombarded South Korea's Yeonpyeong island near their disputed western border Tuesday, setting buildings ablaze and killing at least one marine after warning the South to halt military drills in the area, South Korean officials said. (AP Photo/Ahn Young-joon)

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South Koreans take moment of silence for South Korean marines killed in a North Korean bombardment during a rally against North Korea's attack onto South Korean island, in Seoul, South Korea, Tuesday, Nov. 23, 2010. North Korea shot dozens of rounds of artillery onto a populated South Korean island near their disputed western border Tuesday, military officials said, setting buildings on fire and prompting South Korea to return fire and scramble fighter jets. (AP Photo/Ahn Young-joon)

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Smoke billow from Yeonpyeong island near the border against North Korea, in South Korea, Tuesday, Nov. 23, 2010. North and South Korea exchanged artillery fire Tuesday after the North shelled an island near their disputed sea border, killing at least two South Korean marines, setting dozens of buildings ablaze and sending civilians fleeing for shelter. (AP Photo/Yonhap)

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Smoke billow from Yeonpyeong island near the border against North Korea, in South Korea, Tuesday, Nov. 23, 2010. North and South Korea exchanged artillery fire Tuesday after the North shelled an island near their disputed sea border, killing at least two South Korean marines, setting dozens of buildings ablaze and sending civilians fleeing for shelter. (AP Photo/Yonhap)

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** FILE ** Interior Secretary Ken Salazar, flanked by Bureau of Ocean Energy Management Director Michael R. Bromwich (center) and Assistant Interior Secretary Tom Strickland, visits Louisiana on Monday, Nov 22, 2010. He promised to work with the oil and gas industry and to "ensure that everyone understands the rules of the road." (Associated Press)

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Friends and families of miners trapped after an explosion at the Pike River coal mine leave a briefing with police and company officials in Greymouth, New Zealand, after visiting the Pike River coal mine, Monday, Nov. 22, 2010. (AP Photo/New Zealand Herald, Mark Mitchell)

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Families of miners missing underground of the Pike River coal mine react in Greymouth, New Zealand, Monday, Nov. 22, 2010. Rescue officials on Monday were preparing to send a high-tech robot into a mine tunnel to transmit pictures and assess toxic gas levels three days after an explosion left 29 miners missing underground. (AP Photo/NZPA, Ross Setford)

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The entrance to the Pike River coal mine is cordoned off in Greymouth, New Zealand, Sunday, Nov. 21, 2010. Anguished relatives of 29 workers missing after an explosion at the coal mine grew frustrated over delays in the rescue operation Sunday, as officials prepared to drill a small hole through hundreds of feet (meters) of rock to test for levels of deadly gasses. (AP Photo/Pool)

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