Ill Winds

Dust storms ferry toxic agents between countries and even continents

By Janet Raloff, 15:48 PM April 15, 2008

Second in a two-part series on the effects of the long-range movement of dust. Part I: Dust, the Thermostat. Available at Dust, the Thermostat.

Last spring, Zev Levin flew to northern China. The atmospheric physicist from Tel Aviv University in Israel had been invited to give a series of guest lectures on cloud physics and to meet with meteorological researchers to discuss cloud seeding.

On April 7 at 7 a.m., he awoke in his Baichang hotel expecting sunny skies. Instead, it appeared "pitch blac...

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