Environment

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Graphic shows counties in eight southern states involved in the federal Migratory Bird Habitat Initiative;

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Migratory birds hunt for food on a partially flooded crawfish farm owned by Grantt Guillory near Opelousas, La., on July 1, 2010. (AP Photo/John Flesher)

Members of the Los Angeles Fire Department urban search and rescue team survey damage after a suspected natural gas explosion at a welding shop collapsed part of the building hurling two workers into the street, killing one and leaving the other in critical condition, Friday, July 30, 2010, in Los Angeles. (AP Photo/Gus Ruelas)

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Members of the Los Angeles Fire Department survey damage from a nearby rooftop after a suspected natural gas explosion at a welding shop collapsed part of the building and hurled two workers into the street, killing one and leaving the other in critical condition, Friday, July 30, 2010, in Los Angeles. (AP Photo/Gus Ruelas)

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Members of the Los Angeles Fire Department urban search and rescue team survey damage after a suspected natural gas explosion at a welding shop collapsed part of the building and hurled two workers into the street, killing one and leaving the other in critical condition, Friday, July 30, 2010, in Los Angeles. (AP Photo/Gus Ruelas)

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President Barack Obama steps out of a Jeep Grand Cherokee during his tour of the Jefferson North Chrysler Plant in Detroit, Friday, July 30, 2010. The is plant is where the Cherokee is assembled. (AP Photo/Pablo Martinez Monsivais)

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President Barack Obama addresses employees at the Chrysler's Jefferson North Assembly Plant in Detroit, Friday, July 30, 2010. (AP Photo/Carlos Osorio)

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President Barack Obama addresses employees at the Chrysler's Jefferson North Assembly Plant in Detroit, Friday, July 30, 2010. (AP Photo/Carlos Osorio)

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Pakistani villagers struggle to move to a safe place from a flood hit village near Nowshera, Pakistan, on Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday. Hundreds of thousands more were stranded as rescue workers struggled to reach far-flung villages. (AP Photo/Mohammad Sajjad)

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In this picture taken on Wednesday, July 28, 2010, Pakistani villagers wade through flooded area caused by heavy monsoon rain in a village outskirt of Bannu, Pakistan. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday. (AP Photo/Ijaz Mohammad)

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In this picture taken on Wednesday, July 28, 2010, a Pakistani family flees a flooded village, on the outskirts of Bannu, Pakistan. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in the most severe floods in decades in northwest Pakistan, officials said Thursday. Hundreds of thousands more were stranded as rescue workers struggled to reach far-flung villages. (AP Photo/Ijaz Mohammad)

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A Pakistani gypsy family look out over a flooded water pool after heavy monsoon rain in Lahore, Pakistan, on Tuesday, July 27, 2010. (AP Photo/K.M.Chaudary)

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Pakistani villagers move into safe place from a flooded village near Nowshera, Pakistan, Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday. Hundreds of thousands more were stranded as rescue workers struggled to reach far-flung villages.(AP Photo/Mohammad Sajjad)

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Pakistani stranded people stand on the rooftop of their houses at a flood hit village near Nowshera, Pakistan, on Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday.(AP Photo/Mohammad Sajjad)

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A Pakistani villager with his daughter moves into safe place from a flood hit village near Nowshera , Pakistan, on Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday.(AP Photo/Mohammad Sajjad)

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Pakistani stranded villagers wait for help at the flood hit village near Nowshera, Pakistan, on Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday. Hundreds of thousands more were stranded as rescue workers struggled to reach far-flung villages. (AP Photo/Mohammad Sajjad)

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Pakistani villagers move to a safe place from a flood hit village near Nowshera, Pakistan on Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday. Hundreds of thousands more were stranded as rescue workers struggled to reach far-flung villages. (AP Photo/Mohammad Sajjad)

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Pakistani women wait for transport to move to a safe place from a flood hit village near Nowshera, Pakistan, on Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday. Hundreds of thousands more were stranded as rescue workers struggled to reach far-flung villages. (AP Photo/Mohammad Sajjad)

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Pakistani villagers move to a safe place from a flood hit village near Nowshera, Pakistan, on Thursday, July 29, 2010. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people in most severe floods in decades in northwest Pakistan, officials said Thursday. Hundreds of thousands more were stranded as rescue workers struggled to reach far-flung villages. (AP Photo/Mohammad Sajjad)

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A Pakistani woman sits with her belongings on a roadside as her house is flooded in Nowshera near Peshawar, Pakistan, on Thursday, July 29, 2010. Pakistani villagers move into safe place from a flood hit village near Nowshera. Rivers burst their banks during monsoon rains, washing away streets, battering a dam and killing at least 60 people, official said. (AP Photo/B.K.Bangash)