Tropical zone expanding due to climate change: study

Climate change is rapidly expanding the size of the world's tropical zone, threatening to bring disease and drought to heavily populated areas, an Australian study has found.

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<p><a href="http://www.physorg.com/news166081900.html">Tropical zone expanding due to climate change: study</a></p> <p>Climate change is rapidly expanding the size of the world's tropical zone, threatening to bring disease and drought to heavily populated areas, an Australian study has found.</p>