China's smog problem explained

A thick haze has this week smothered Beijing and surrounding areas, with tens of millions of people in northern China under severe pollution warnings.

Northern China chokes under severe pollution

Tens of millions of people across northern China were under severe pollution warnings Tuesday, with authorities urging them to reduce outdoor activities as a grayish smog enveloped the region.

Can a $20 billion bet wean Indonesia off coal?

Less than a year after it was announced, a $20 billion bet to wean Indonesia off coal is mired in controversies over financing and the construction of new plants to power industry.

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