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<blockquote data-quote="Sportello" data-source="post: 1800005" data-attributes="member: 55299"><p>[USER=45230]@oldngray[/USER], I prefer a recent, peer reviewed, scientific study to a 12 year old blog post.</p><p></p><p>Maybe you didn't read about factors considered:</p><p></p><p><em>The pair has carried out a life cycle assessment (LCA) of 2MW wind turbines in order to identify the net environmental impact of the production and use of such devices for electricity production. An LCA takes into account <strong>sourcing of key raw materials (steel, copper, fiberglass, plastics, concrete, and other materials), transport, manufacturing, installation of the turbine, ongoing maintenance through its anticipated two decades of useful life and, finally, the impacts of recycling and disposal at end-of-life.</strong></em></p><p><em></em></p><p><em></em></p><p><em>Their analysis shows that the vast majority of predicted environmental impacts would be caused by materials production and manufacturing processes. However, the payback for the associated energy use is within about 6 months, the team found. It is likely that even in a worst case scenario, lifetime energy requirements for each turbine will be subsumed by the first year of active use. <strong>Thus, for the 19 subsequent years, each turbine will, in effect, power over 500 households without consuming electricity generated using conventional energy sources</strong>.</em></p></blockquote><p></p>
[QUOTE="Sportello, post: 1800005, member: 55299"] [USER=45230]@oldngray[/USER], I prefer a recent, peer reviewed, scientific study to a 12 year old blog post. Maybe you didn't read about factors considered: [I]The pair has carried out a life cycle assessment (LCA) of 2MW wind turbines in order to identify the net environmental impact of the production and use of such devices for electricity production. An LCA takes into account [B]sourcing of key raw materials (steel, copper, fiberglass, plastics, concrete, and other materials), transport, manufacturing, installation of the turbine, ongoing maintenance through its anticipated two decades of useful life and, finally, the impacts of recycling and disposal at end-of-life.[/B] Their analysis shows that the vast majority of predicted environmental impacts would be caused by materials production and manufacturing processes. However, the payback for the associated energy use is within about 6 months, the team found. It is likely that even in a worst case scenario, lifetime energy requirements for each turbine will be subsumed by the first year of active use. [B]Thus, for the 19 subsequent years, each turbine will, in effect, power over 500 households without consuming electricity generated using conventional energy sources[/B].[/I] [/QUOTE]
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