News From the Field
Pre-industrial rise in greenhouse gases had natural and anthropogenic causes
November 21, 2013
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.
Oregon State University
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