- Dec 10, 2019 2:45 am GMT
- 258 views
The claim by the US Energy Information Administration that GHG effects from hydropower may be equal to greater than the greenhouse effect of carbon dioxide emissions from an equivalent amount of electricity generation with fossil fuels is astounding, given the hype about hydropower as a renewable, green, clean energy source.
"In the United States, the Environmental Protection Agency defines renewable energy similarly, as 'resources that rely on fuel sources that restore themselves over short periods of time and do not diminish.' But it also makes an interesting distinction. Large-scale hydropower is, by definition, renewable power. But it’s not green power. 'Green power is a subset of renewable energy and represents those renewable energy resources and technologies that provide the highest environmental benefit,' a term that allows only for 'low-impact small hydroelectric resources,' according to the agency. 'Some renewable energy technologies can have an impact on the environment. ... For example, large hydroelectric resources can have environmental trade-offs on such issues as fisheries and land use.' The U.S. Energy Information Administration goes further, by underscoring the carbon and methane emissions associated with large scale hydropower. The U.S. Energy Information Administration goes further, by underscoring the carbon and methane emissions associated with large scale hydropower. 'Greenhouse gases such as carbon dioxide and methane may also form in reservoirs and be emitted into the atmosphere. The exact amounts of greenhouse gases that form in hydropower reservoirs is uncertain,' it writes. 'The greenhouse effect from the emissions from reservoirs in tropical and temperate regions, including the United States, may be equal to or greater than the greenhouse effect of the carbon dioxide emissions from an equivalent amount of electricity generation with fossil fuels.' "