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Pre-industrial rise in greenhouse gases had natural and anthropogenic causes


November 21, 2013

polar graphic For years scientists have intensely argued over whether increases of potent methane gas concentrations in the atmosphere--from about 5,000 years ago to the start of the industrial revolution--were triggered by natural causes or human activities. A new study, published Friday in the journal Science, suggests the increase in methane likely was caused by both. Full Story

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Oregon State University

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