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Tag: dams
The World Bank is bringing back big, bad dams
2013-07-16 12:30:00| Climate Ark Climate Change & Global Warming Newsfeed
Guardian: The big, bad dams of past decades are back in style. In the 1950s and '60s, huge hydropower projects such as the Kariba, Akosombo and Inga dams were supposed to modernise poor African countries almost overnight. It didn't work out this way. As the independent World Commission on Dams found, such big, complex schemes cost far more but produce less energy than expected. Their primary beneficiaries are mining companies and aluminium smelters, while Africa's poor have been left high and dry. The...
Heavy rains fill dams, cause some minor flooding
2013-07-09 16:16:44| Energy - Topix.net
Heavy rains over the weekend have pushed the Tennessee River up to flood stage, closing Chattanooga's Tennessee Riverpark and affecting about 30 Chattanooga families.
Tags: heavy
fill
minor
flooding
Brazil's hydro dams could make its greenhouse gas emissions soar
2013-07-01 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed
GlobalPost: Officials here frequently claim that the huge hydroelectric dams that increasingly dot the Brazilian Amazon are a source of "clean energy.' The dams often flood vast areas of rain forest, leading to a major loss of biodiversity and the devastating displacement of indigenous communities from their ancestral lands. That is justified, President Dilma Rousseff claims, because they help fight climate change. "[Hydroelectric power] does not emit greenhouse gases, and that means we have a renewable energy...
Tags: make
gas
emissions
hydro
Hope Amid the Dams and Dangers
2013-05-28 13:31:00| Climate Ark Climate Change & Global Warming Newsfeed
New York Times: Jeff Opperman, a senior freshwater scientist with the Nature Conservancy, took a once-in-a-lifetime trip down the Mekong River in Southeast Asia with his wife and two children, ages 8 and 10. This is his final post. Previous posts can be found here. In my previous post I described how dozens of hydropower dams -- planned and under construction -- could lead to significant declines in the Mekongs fisheries productivity, which feeds tens of millions of people, and its charismatic species like the...
Deforestation Dries Up Dams Threatening Hydropower
2013-05-24 20:31:00| Climate Ark Climate Change & Global Warming Newsfeed
SciDevNet: Deforestation may lead to electricity shortages in tropical rainforest regions that rely heavily on hydropower, as fewer trees mean less rainfall for hydropower generation, a study shows. For example, if deforestation continues, one of the world's largest dam projects in Brazil will deliver around a third less energy than is currently estimated, according to the research, published in Proceedings of the National Academy of Sciences (PNAS) last week (13 May). Researchers had presumed that cutting...
Tags: threatening
dams
dries
deforestation
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