Nicaragua volcano spews tons of ash

Nicaragua's San Cristobal volcano shot tons of ash into the sky after forcing evacuations of nearby towns, officials said.

Removing sulfur from jet fuel cools climate: study

A Yale study examining the impact of aviation on climate change found that removing sulfur from jet fuel cools the atmosphere. The study was published in the October 22 issue of Geophysical Research Letters.

Earth is having a bad acid trip, study finds

Earth may be overdosing on acid - not the "turn on, tune in, drop out" kind, but the "kill fish, kill coral, kill crops" kind. And it's shaping up to be a very bad trip.

Global warming pause linked to sulfur in China

Scientists have come up with a possible explanation for why the rise in Earth's temperature paused for a bit during the 2000s, one of the hottest decades on record.

Study: Emissions trading doesn't cause pollution 'hot spots'

Programs that allow facilities to buy and sell emission allowances have been popular and effective since they were introduced in the U.S. two decades ago. But critics worry the approach can create heavily polluted "hot spots" ...

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