Nuclear provides 20% of U.S. electricity, roughly double the combined amount from wind, solar and hydropower.
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The rest comes from coal, natural gas and other resources, like hydropower and wind farms.
Hydropower produces about 15% of the world's electricity, compared with 3% for other renewables.
Hydropower is about 3 percent, and building more dams would also have environmental effects.
Of that total, hydropower and wind provided the majority, while photovoltaics and solar thermal contributed approximately 5%.
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So don't expect a massive expansion of new transmission lines or any expansion of new, "clean" hydropower.
Dams are springing up on Myanmar's rivers, to generate hydropower to keep the lights burning in Yunnan.
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In power "emergencies, " however, those fish passage measures can be suspended to allow for additional hydropower generation.
The U.S. has also championed a number of electricity-generation projects within Pakistan such as helping renovate hydropower dams.
The Japanese also benefitted from heavy rains that boosted hydropower and from unusually reliable fossil-fuel generators, he said.
Washington state has been another bright spot, powered by Boeing and other manufacturers attracted to its low-cost, low-emission hydropower.
The Chinese are also showing interest in investing in hydropower, agriculture and construction.
Coal provides some 60% of its power output, and its second-cheapest source after hydropower (which is 10% of total output).
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Price controls, demand growth and a drought-induced decline in hydropower production are among the many culprits contributing to this problem.
Brazil, for example, is looking at a shortfall after years of filling about 90% of its energy needs with hydropower.
The remaining 40% would come from wind farms, along with a smaller element of biomass and hydropower as a back-up.
It is making substantial investments in a renewable energy, and is now the largest solar, wind, nuclear and hydropower market.
The group is partnering with AES to develop hydropower projects and has plans to set up Nepal's biggest cement plant.
They researchers looked closely at Brazil's highly controversial Belo Monte dam, said to be the world's third largest hydropower project.
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The third major factor driving the fall in emissions was the rise in renewable energy consumption, led by wind and hydropower.
The country's hydropower potential, estimated at 84, 000 megawatts, has barely been tapped (giant India, by contrast, has a potential of 150, 000mw).
Given this region's history of drought, the IMF is recommending that governments avoid dependency on hydropower as an engine of growth.
The ADB says only about 3% of Africa's hydropower potential is tapped.
Its rivers, plunging from well-watered highlands into deep canyons, have hydropower potential.
But huge investments in hydropower in Bhutan (in return for the guaranteed supply of fixed-price electricity into India's grid) helped both countries.
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He adds that, by comparison, state-owned hydropower utility National Hydroelectric Power Corp.
Count hydropower, biomass, tidal, geothermal, waste-to-energy, solar and wind, and you have only 6.1% of the rich world's energy supply in 1995.
Hydropower is expected toprovide a significant proportion of the new energy demand.
The oil-equivalent metric represents all forms of energy consumed, including crude oil, nuclear power, coal, natural gas and renewable sources such as hydropower.
Nationwide, about 5% of the electricity produced in 2012 came from renewable sources (excluding hydropower), according to the U.S. Energy Information Administration.
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