Landscape Architect & Specifier News

DEC 2018

LASN is a photographically oriented, professional journal featuring topics of concern and state-of-the-art projects designed or influenced by registered Landscape Architects.

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lasn marketplace 90 landscape lighting I n f o r m a t i o n R e q u e s t # 1 7 3 I n f o r m a t i o n R e q u e s t # 1 2 7 I n f o r m a t i o n R e q u e s t # 1 4 5 From Carbon Dioxide-reducing Algae to Carbon Fibers Algae, which have converted carbon dioxide from the atmosphere into algae oil, can then be used to economically produce carbon fibers in a process developed by chemists and researchers at the Technical University of Munich. In a climate-neutral process, the algae are first used to make polyacrylonitrile (PAN) fibers. Parabolic solar reflectors then char the PAN-fibers to create carbon fibers that can be incorporated into lightweight and high-strength materials. At the end of their life cycle, the carbon fibers can be buried, permanently removing the associated carbon dioxide equivalents from the atmosphere. Large-scale processing plants are proposed in North Africa where the use of land would not compete with agricultural practices. Another Use for Recycled Tires A chip seal application, which is the process of putting down a protective surface to an existing pavement to extend its service life, was recently completed in Michigan with hot rubber from recycled tires replacing conventional asphalt emulsion in the asphalt liquid - the first time this more environmentally-friendly procedure has been done in the U.S. More Applause for Renewable Energy The U.S. Energy Information Administration reports that carbon dioxide emissions created by the U.S. electric power industry have decreased by 28% since 2005; partly due to slower growth of demand, but also because of the decline in reliance on fossil fuels to produce electricity as wind and solar continues to multiply as power sources. The industry's use of non-carbon power sources, mainly renewable energy as opposed to nuclear and hydroelectricity, increased from 28% in 2005 to 38% in 2017. And, a survey from Consumer Reports found that 76% of Americans believe that the expansion of renewable energy "is a worthwhile goal." This includes the coal-reliant states of Illinois, Tennessee, Ohio and Virginia, all of which reported favorable outlooks of at least 71%. Also, 53% of respondents said they would personally shell out for solar panels if they paid for themselves within five years.

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