A View from David Appell

Hydropower's Downside

Sometimes you can’t seem to win. Hydropower, which seems one of the greener power sources, is now reported to have negative repercussions as far as greenhouse gases are concerned. This article from New Scientist magazine claims that “hydroelectric power can…

  • February 24, 2005

Sometimes you can’t seem to win. Hydropower, which seems one of the greener power sources, is now reported to have negative repercussions as far as greenhouse gases are concerned. This article from New Scientist magazine claims that “hydroelectric power can seriously damage the climate. In some cases, the article claims, dams produce more greenhouse gases per unit of power generated than does a fossil fuel-powered plant.

The reason? The carbon tied up in trees and plants in a dammed lake’s footprint rot and release their CO2; and plant matter that decomposes without oxygen results in a build-up of dissolved methane, which is released when the water goes through the dam’s turbine.

Essentially, the article says, man-made reservoirs convert carbon dioxide in the at
mosphere into methane, which is a much more potent greenhouse gas. And there is enough of this going on that countries ought to include it in their carbon budgets.

Uh oh–you've read all of your free articles for this month.

Insider Premium
$179.95/yr US PRICE

Want more award-winning journalism? Subscribe to Insider Plus.
  • Insider Plus {! insider.prices.plus !}*

    {! insider.display.menuOptionsLabel !}

    Everything included in Insider Basic, plus ad-free web experience, select discounts to partner offerings and MIT Technology Review events

    See details+

    What's Included

    Bimonthly home delivery and unlimited 24/7 access to MIT Technology Review’s website.

    The Download. Our daily newsletter of what's important in technology and innovation.

    Access to the Magazine archive. Over 24,000 articles going back to 1899 at your fingertips.

    Special Discounts to select partner offerings

    Discount to MIT Technology Review events

    Ad-free web experience

/
You've read all of your free articles this month. This is your last free article this month. You've read of free articles this month. or  for unlimited online access.