What are 'green cities'?
Dear EarthTalk: What is the "green cities" movement? - John Moulton, Greenwich, Conn.
Environment
Mar 23, 2009
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News tagged with green energy
Deep Green underwater kite to generate electricity (w/ Video)
(PhysOrg.com) -- An underwater tidal turbine called an “underwater kite” has just secured finance from investors to ensure its 2011 tests can go ahead.
When green turns toxic: Norwegians study Electric Vehicle life cycle
(Phys.org)—Questioning thoughts arise from a bracing study from Norway. The electric car might be a trade-in of an old set of pollution problems for a new set. Thanks but no thanks to a misguided cadre selling on the green ...
Artificial photosynthesis can produce food without sunshine
Photosynthesis has evolved in plants for millions of years to turn water, carbon dioxide, and the energy from sunlight into plant biomass and the foods we eat. This process, however, is very inefficient, with only about 1% ...
Biotechnology
Jun 23, 2022
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2243
Researchers find simple and cheap way to mass-produce graphene nanosheets
Mixing a little dry ice and a simple industrial process cheaply mass-produces high-quality graphene nanosheets, researchers in South Korea and Case Western Reserve University report.
Nanomaterials
Mar 26, 2012
22
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A new generation of power: Hi-tech rechargeable batteries developed for military
Scientists reported progress today in using a common virus to develop improved materials for high-performance, rechargeable lithium-ion batteries that could be woven into clothing to power portable electronic devices. They ...
Energy & Green Tech
Aug 23, 2010
12
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Project to pour water into volcano to make power
(AP) -- Geothermal energy developers plan to pump 24 million gallons of water into the side of a dormant volcano in Central Oregon this summer to demonstrate new technology they hope will give a boost to a green energy sector ...
Energy & Green Tech
Jan 14, 2012
27
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Supercapacitors hailed as potential answer to greener public transportation
(Phys.org)—Imagine a bus that uses electrical storage that costs much less than traditional batteries, can fully charge each time the bus stops, and has enough power to easily get to the next stop. The supercapacitor, once ...
Energy & Green Tech
Oct 3, 2012
22
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Analyzing bird population declines due to renewable power sources in California
A team of researchers affiliated with a large number of institutions in the U.S. has attempted to determine the vulnerability of bird populations to alternative energy production. In their paper published in the journal Royal ...
Speed-bump device converts traffic energy to electricity
(PhysOrg.com) -- The two little words "speed bump" usually evoke unpleasant memories of spilled coffee and back-seat arguments questioning if and where you learned how to drive. In some green energy circles, speed bumps take ...
Green energy
Green energy is the term used to describe sources of energy that are considered to be environmentally friendly and non-polluting, such as geothermal, wind, solar, and hydro. Sometimes nuclear power is also considered a green energy source. Green energy sources are often considered "green" because they are perceived to lower carbon emissions and create less pollution.
Green energy is commonly thought of in the context of electricity, mechanical power, heating and cogeneration. Consumers, businesses, and organizations may purchase green energy in order to support further development, help reduce the environmental impacts of conventional electricity generation, and increase their nation’s energy independence. Renewable energy certificates (green certificates or green tags) have been one way for consumers and businesses to support green energy.
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