Pollution

High levels of air pollution forced travel restrictions around Paris on Monday, but some relief is on the way.

The dry conditions in California have only worsened winter haze, so regulators are implementing burn bans to prevent soot from accumulating.

A Chinese man in a northern city is suing the government for the choking pollution that has settled over the city, arguing that the government failed in its duty to protect the environment.

Increasing air pollution is threatening the health of those living in the Indian city of New Delhi.

The current emergency in Shanghai comes at the end of a year in which China’s environmental crisis reached a tipping point.

An influx of nitrogen-based compounds, usually from industrial agriculture, fuel exhaust and power plants, is blanketing national parks around the country, potentially disrupting their ecosystem.

The chemical Erin Brockovich fought to protect people from decades ago still plagues California water.

More mercury will be released to the atmosphere and the oceans due to wildfires and violent storms, which are more likely to occur in a climate change scenario.

Small-scale gold mining is responsible for most current mercury pollution. But overall, the largest source of the heavy metal is "legacy mercury" emitted by humans decades or centuries ago.

Will China's new pollution controls tame the nation's notorious smog?