These fish and meat options are the most environmentally costly

June 12, 2018 by  
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Farmed seafood, wild-caught fish , or livestock : which one is the most environmentally costly to produce? A University of Washington -led study probed that question by scrutinizing 148 life-cycle assessments for animal protein production. Lead author Ray Hilborn, School of Aquatic and Fishery Sciences professor, said in a statement , “If you’re an environmentalist, what you eat makes a difference. We found there are obvious good choices, and really obvious bad choices.” (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = ‘https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v3.0’; fjs.parentNode.insertBefore(js, fjs);}(document, ‘script’, ‘facebook-jssdk’)); The environmental costs of producing meat, seafood Which food type is more environmentally costly to produce — livestock, farmed seafood, or wild-caught fish? New research from the University of Washington takes a comprehensive look at the environmental impacts of different types of animal protein production. Read more: http://www.washington.edu/news/2018/06/11/choice-matters-the-environmental-costs-of-producing-meat-seafood/ Posted by University of Washington News on Monday, June 11, 2018 Scientists drew on four metrics to compare environmental impacts of different animal proteins: greenhouse gas emissions , energy use, potential to add excess nutrients like fertilizer into the environment, and potential to emit substances that help cause  acid rain . They used 40 grams of protein — around the size of an average burger patty — as their standard amount . Related: Vegan diets deliver more environmental benefits than sustainable dairy or meat Industrial beef production and farmed catfish were the most environmentally costly in general, according to the university. Farmed mollusks such as scallops, oysters, or mussels and small wild-caught fish were the least environmentally costly. The university said capture fish choices like pollock, the cod family, and hake also have relatively low impact, and farmed salmon performed well. But there were differences across animal proteins — for example, the researchers said livestock production consumed less power than most seafood aquaculture as continual water circulation uses up electricity. Farmed tilapia, shrimp, and catfish used the most energy. Beef and catfish aquaculture generated around 20 times more greenhouse gases than chicken , farmed salmon, farmed mollusks, and small capture fisheries. “When compared to other studies of vegetarian and vegan diets, a selective diet of aquaculture and wild capture fisheries has a lower environmental impact than either of the plant-based diets,” according to the university. The journal Frontiers in Ecology and the Environment published the study this week. Four University of Washington scientists and one scientist from company Avalerion Capital contributed. + University of Washington + Frontiers in Ecology and the Environment Images via

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These fish and meat options are the most environmentally costly

New study suggests that plastic waste may be transformed into usable energy

June 12, 2018 by  
Filed under Green, Recycle

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A new study from the Earth Engineering Center (EEC|CCNY) at the Grove School of Engineering of the City College of New York suggests that plastic waste can effectively be converted into usable fuel and energy rather than being dumped in a landfill or polluting the ocean. Researchers found that the addition of non-recycled plastics (NRPs) to a chemical recycling process known as gasification results in the production of crude oil -based fuel. It also reduces pollution, both plastic and emissions, in contrast to traditional methods of disposing of plastic waste, such as incineration or dumping. Plastic is a product derived from crude oil and, as such, contains significant latent energy that can be harnessed using the right technology and technique. “This study demonstrates that because carbon- and hydrogen -rich plastics have high energy content, there is tremendous potential to use technologies like gasification to convert these materials into fuels, chemicals and other products,” study co-author Marco J. Castaldi told Phys.org . As concerns rise over plastic pollution, scientists are looking to reframe plastic as a resource rather than waste . “Plastics have an end-of-life use that will be turning waste into energy, which is something we all need and use,” study co-author Demetra Tsiamis told Phys.org. Related: UN releases first “state of plastics” report on World Environment Day Gasification uses air or steam to heat plastic waste. This results in the creation of industrial gas mixtures called synthesis gas, or syngas. This syngas can either be converted into diesel and petrol or burned directly to generate electricity . This process is preferable to incineration of plastic waste because it allows for the storage of potentially usable energy that otherwise would be wasted through incineration. Gasification is also better for air quality, producing much lower levels of sulfur and nitrogen oxide emissions. + Earth Engineering Center Via Phys.org Images via Depositphotos (1, 2)

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New study suggests that plastic waste may be transformed into usable energy

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