Level of important greenhouse gas has stopped growing

Scientists at UC Irvine have determined that levels of atmospheric methane -- an influential greenhouse gas -- have stayed nearly flat for the past seven years, which follows a rise that spanned at least two decades.

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<p><a href="http://www.physorg.com/news83255550.html">Level of important greenhouse gas has stopped growing</a></p> <p>Scientists at UC Irvine have determined that levels of atmospheric methane -- an influential greenhouse gas -- have stayed nearly flat for the past seven years, which follows a rise that spanned at least two decades.</p>