The US Environmental Protection Agency on Wednesday said it plans to strengthen regulations for emissions of ozone, a smog-causing pollutant blamed for respiratory ailments affecting millions of Americans.
Gasoline prices generally go up in the summer and then drop in the winter, but it's not just a matter of increased vacation travel.
The US policeman who shot dead an unarmed black teenager in the Missouri town of Ferguson, triggering weeks of racially-charged unrest, will not face charges, the St Louis County prosecutor said.
Acid rain and deforestation runoff are causing a drop in the calcium content of some lakes in North America and western Europe, with ominous potential effects.
The new U.S.-China climate deal may be good politics for Presidents Obama and Xi. But what about the atmosphere?
Most Americans guessed wrong, when asked in 1992, how likely it was they'd live to be 75. Continue reading â†’
Diminishing supplies of groundwater threaten the world's food supply and political instability, according to a new study. Continue reading â†’
El Nino probably won't bring California drought-busting winter rains, but the news may not be all bad.
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