File photo dated 08/04/12 of a man places his hand on the parched soil in the Greater Upper Nile region of north-eastern South Sudan, Africa. Global warming could have unforeseen effects on the health... more 
File photo dated 08/04/12 of a man places his hand on the parched soil in the Greater Upper Nile region of north-eastern South Sudan, Africa. Global warming could have unforeseen effects on the health of the world's soil by affecting bugs that live within it, scientists have warned. less 
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Thu, Jun 27, 2013 11:10 PM EDT