Earth
Acid rain’s surprising legacy in US rivers
Air pollution controls mean that the acid rain that devastated forests, ponds and streams in the US has reduced, but left excessive alkalinity in its wake
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Air pollution controls mean that the acid rain that devastated forests, ponds and streams in the US has reduced, but left excessive alkalinity in its wake
Zaatari refugee camp has grown from almost nothing to a population of more than 140,000 in a year, as refugees pour in from neighbouring Syria