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Environmental News Network -- Know Your Environment
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Climate change and nutrition
Researchers now say in a revealing Nature paper that the most significant health threat from climate change has started to happen. Crops that provide a large share of the global population with most of their dietary zinc and iron will have significantly reduced concentrations of those nutrients at the elevated levels of atmospheric CO2 anticipated by around 2050, according to research by Israeli scientists published in Nature this month.
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Longer growing season does not yield growth increase for trees and shrubs
As the earth's temperatures rise, some have speculated that trees and shrubs in the colder climates might experience and increase in growth as a result of the extended growing season. "Not so," says a recent study authored by a University of Washington biology and applied mathematics postdoctoral student. Her study demonstrates that bushes achieve less yearly growth when cold winter temperatures are interrupted by warm spurts that trigger growth.
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Antarctica, Australia and Climate Change
Rising greenhouse gas levels are causing stronger winds over the Southern Ocean. It's good news for Antarctica, writes Tim Radford, as the circumpolar winds are keeping its ice caps cold. But Australia is getting hotter and drier - and its problems will only increase. The answer to one of the enduring puzzles of global warming - the apparently sluggish response of the Antarctic continent to rising greenhouse gas levels - may have been settled by Australian scientists.
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Overwhelming the Mississippi
New evidence from University of Texas at Austin researchers posit that the great Mississippi's natural ability to chemically filter out nitrates is being overwhelmed. UT's hydrologists demonstrate the enormity of the filtering process for almost every drop of water that enters into the 311,000-mile long course ending in the Gulf of Mexico.
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Bee booby-traps defend African farms from elephants
Wire fences booby-trapped with beehives are being built in five African countries to prevent elephants from raiding farms, while also providing local people with honey. 'Beehive fences' are now being put up in Botswana, Mozambique, Tanzania and Uganda by UK charity Save the Elephant, says Lucy King, leader of the Elephants and Bees Project in Kenya — and they are already in use at three communities in Kenya.
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