Farms outside Baghdad as seen from a U.S. Army Blackhawk helicopter. Much of Iraq's soil has a high salt content because of flooding and poor drainage. Jim Gordon/U.S. Army Corps of Engineers/Flickr hide caption

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The Bronx may be up and the Battery down, but Central Park is where an amazing wealth of different sorts of microbes play. iStockphoto hide caption

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Soil Doctors Hit Pay Dirt In Manhattan's Central Park

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