Delhi homeless to be given masks as smog worsens: official

New Delhi's homeless will be given cotton masks to help them survive in the world's most polluted major city, officials said Monday, although experts said the basic coverings would be useless against deadly smog particles.

African smoke-cloud connection target of NASA airborne flights

Over the southeast Atlantic Ocean, a 2,000-mile-long plume of smoke from African agricultural fires meets a near-permanent cloud bank offshore. Their meeting makes a natural laboratory for studying the interactions between ...

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