That ‘Methane Time Bomb’ now lurks behind dams

From the American Chemical Society. I wonder if they studied how much methane comes from sediment loads dropped by rivers naturally and compared them? The Mississippi Delta alone must be a terrible offender. Sediment trapped behind dams makes them ‘hot spots’ for greenhouse gas emissions With the “green” reputation of large hydroelectric dams already in…

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Dammed if you do, Dammed if you don’t

Yes, the headline is purposely that way. From Oregon State University: Dam construction to reduce greenhouse gases causes ecosystem disruption CORVALLIS, Ore. – Researchers conclude in a new report that a global push for small hydropower projects, supported by various nations and also the Kyoto Protocol to reduce greenhouse gas emissions, may cause unanticipated and…

Dam emissions, not so bad after all

From the Cary Institute of Ecosystem Studies Greenhouse gas impact of hydroelectric reservoirs downgraded Site design and location can minimize carbon dioxide, methane emissions An international team of scientists has amassed the largest data set to date on greenhouse gas emissions from hydroelectric reservoirs. Their analysis, published today in the online version of Nature Geoscience,…