Sentences with phrase «produce significant amounts of methane»
To see how far back humans were producing significant amounts of methane, Sapart and her colleagues analyzed ice cores from Greenland.
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The carbon deposits show that something caused a significant uptick in the amount of carbon - containing gases — carbon dioxide or methane — produced at the time of the mass extinction.
Hydroelectric dams produce significant amounts of carbon dioxide and methane, and in some cases produce more of these greenhouse gases than power plants running on fossil fuels.