The U.S. Government is spending millions of dollars to research the feasibility of stuffing carbon dioxide into coal seams and fields of briny water deep beneath the Earth. But, a scientist at the American Association for the Advancement of Science (AAAS) Annual Meeting argues that the government isnt thinking big enough in its plans to remove carbon dioxide from the atmosphere.
Dissatisfied with the long-term potential of most current technologies for carbon sequestration, Klaus Lackner, Ewing-Worzel Professor of Geophysics at Columbia University, has designs for new power plants that would capture carbon dioxide before it leaves the facility, as well as for "synthetic trees" that would pluck carbon from the air, mix it with magnesium silicate, and store the carbon in the "rocks" that would result from the chemical interaction between the elements.
"Injecting carbon underground is a short-term solution," Lackner said. "The oil industry has done this with 20 million tons a year in West Texas, but that is not the scale were talking about here. We need to find a way to put away 20 billion tons." The Intergovernmental Panel on Climate Change has estimated that worldwide carbon dioxide emissions could more than triple over the next 100 years, from 7.4 billion tons of carbon per year in 1997 to approximately 20 billion tons per year by 2100. Lackner argued that large-scale carbon sequestration would allow the continued use of carbon-based fuels during the time needed to develop alternative sources of energy.
Monica Amarelo | EurekAlert!
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Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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