Dear EarthTalk: If you have an electric or plug-in hybrid car, you're paying for electricity rather than gasoline all or most of the time. How does that cost compare to a gas-powered car's cost-per-mile? And since the electricity ...
Environment
Mar 30, 2009
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When climate researcher Dailson Bertassoli went to measure greenhouse gas emissions at the Belo Monte hydropower plant in Brazil, the first thing he noticed was the bubbles.
Environment
Jun 26, 2021
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994
Norwegian hydropower could make Norway the "green battery" of Europe—not by building new power plants, but by further developing the hydropower installations that were built out beginning at the turn of the last century.
Energy & Green Tech
Jul 10, 2015
3
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While most developed countries have reduced the construction of large dams for the production of electricity in recent decades, developing countries, including Brazil, have embarked on even more massive hydropower developments.
Environment
Jan 11, 2019
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122
California now gets about 5 percent of its electricity from wind power, according to data released Tuesday by the California Wind Energy Association.
Energy & Green Tech
Feb 7, 2012
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The recent IPCC report has made it clear that we need to change our energy supply from fossils to renewable energy if we want to avoid catastrophic climate change. This transition has to happen now and it has to happen fast.
Energy & Green Tech
Nov 26, 2018
0
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China's wild finless porpoises are heading toward extinction, a conservation group said Thursday, with the dolphin-like animals now rarer than the giant panda.
Ecology
Mar 28, 2013
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Bourne Energy, a company based in Malibu, California, specializes in a variety of hydropower systems. While most of its technology is for large-scale applications, with multiple units generating energy on the megawatt scale, ...
(Phys.org) —Whether a person is residing off-grid, or on an outdoors adventure off-grid, finding a place to juice the smartphone is not always trivial. A Kickstarter project aims to interest people in a prototype device ...
Almost two in three of Earth's longest rivers have been severed by dams, reservoirs or other manmade constructions, severely damaging some of the most important ecosystems on the planet, researchers said Wednesday.
Environment
May 8, 2019
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Hydropower, hydraulic power, hydrokinetic power or water power is power that is derived from the force or energy of falling water, which may be harnessed for useful purposes. Since ancient times, hydropower has been used for irrigation and the operation of various mechanical devices, such as watermills, sawmills, textile mills, dock cranes, and domestic lifts. Since the early 20th century, the term is used almost exclusively in conjunction with the modern development of hydro-electric power, the energy of which could be transmitted considerable distance between where it was created to where it was consumed.
Another previous method used to transmit energy had employed a trompe, which produces compressed air from falling water, that could then be piped to power other machinery at a distance from the energy source.
Water's power is manifested in hydrology, by the forces of water on the riverbed and banks of a river. When a river is in flood, it is at its most powerful, and moves the greatest amount of sediment. This higher force results in the removal of sediment and other material from the riverbed and banks of the river, locally causing erosion, transport and, with lower flow, sedimentation downstream.
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