Soil tainted by air pollution expels carbon

New UC Riverside research suggests nitrogen released by gas-powered machines causes dry soil to let go of carbon and release it back into the atmosphere, where it can contribute to climate change.

Choking on factory waste: the Nile's rising scourge

As tourists pose for selfies on the shores of Lake Victoria in Uganda, factories within spitting distance of the source of the Nile dump their waste directly into Africa's longest river.

Air pollution 'silent killer' in African cities: study

Pollution in Africa's fast-expanding cities is deadlier than thought, yet green solutions could save tens of thousands of lives and avert billions of dollars in damage, a report said Thursday.

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