Rozbor o co se opira Planet of Humans
The one constant voice throughout the film, apart from narrator Jeff Gibbs is that of presenter, and author, Ozzie Zehner, whose discourse over the course of the film is overwhelmingly negative about each of the various renewable energy technologies examined and assessed by the movie. The big question though is how reliable Zehner’s narrative actually is, especially given that the film largely seems to be based on Zehner’s book, Green Illusions: The Dirty Secrets of Clean Energy and the Future of Environmentalism published in 2012.
Ozzie Zehner attended Kettering University and the University of Amsterdam. According to his bio on Academia “He has written for academic and mainstream publications including Christian Science Monitor, The American Scholar, The Hill, UTNE, Truthout, ARTE, IEEE Spectrum, Women’s Studies Quarterly, and other publications. He regularly guest lectures at universities and serves as a reviewer for the Intergovernmental Panel on Climate Change (IPCC)”
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However, how do Zehner’s claims really stack up when you start to focus in on them? It turns out that a number of critics over the years have accused him of distorting the truth about clean energy. Shortly after Zehner’s book came out for instance, in July 2012, Chris Meehan of Clean Energy Authority website, pointed out that other energy sources, besides solar, produce sulphur hexafluoride and do so in greater quantities.
Meehan mentioned a study by the National Renewable Energy Laboratory (NREL) that evaluated life-cycle greenhouse gas emissions for various energy generation technologies. This study found that solar PV emitted an average of 45 grams per kWh, compared to 500 grams per kWh for natural gas and 1,001 grams per kWh for coal. In reaching this finding, NREL examined 2,100 published references, subjecting them to three rounds of critical reviews by experts. Across the range of about 10 to 200 grams per kWh, even the highest estimate for production of greenhouse gases from PV manufacturing was about 40 percent of that for natural gas and 20 percent for coal, based on a meta-analysis of 46 estimates from 17 studies. NREL analyst Austin Brown found that 86 percent of SF6 emissions result from its use as an electrical insulator, with only 7 percent arising from manufacturing semiconductors with only a subset of that coming from solar cell manufacture. Brown also noticed that while SF6 is indeed a potent greenhouse gas, it nevertheless forms only a very small contribution to overall greenhouse gas emissions, at 2/10th of 1 percent.
https://www.renewableenergymagazine.com/panorama/just-plain-wrong-the-false-claims-errors-20200513