Lethal air pollution booms in emerging nations

International experts are warning that potentially lethal air pollution has boomed in fast-growing big cities in Asia and South America in recent decades.

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<p><a href="http://www.physorg.com/news157003027.html">Lethal air pollution booms in emerging nations</a></p> <p>International experts are warning that potentially lethal air pollution has boomed in fast-growing big cities in Asia and South America in recent decades.</p>