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Operation You can use AFLEET, the Alternative Fuel Life-Cycle Environmental and Economic Transportation tool, from Argonne National Laboratory, to quickly do this analysis. Using the US average electricity mix, annual mileage of 12,400 (20,000 km) and plugging in 141 mpgE for the BEV (Tesla) and 45 mpg for the HEV (Prius), here's the GHG emissions results:...


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This isn't a complete answer but I would avoid buying PV panels built in countries with poor environmental regulations. That would be a good place to start. For example China. Then if possible avoid companies that mine the materials they're built from in places like China or Africa. Again, the regulations allow much more pollution than places like Europe ...


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One approach is to look at what changes in behavior your electronics enable, and compare the benefits of those changes (typically per unit time) to the cost (overall) of the device. Some examples: a person with a Kindle may stop buying paper books and causing paper books to be shipped to them or their nearest store a person with a GPS may stop buying paper ...


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You can work out an approximation based on percentage components and the energy cost to liquify air. Assume that the energy comes from electricity and you can derive your figures. This gives you a first approximation. However it gets messier than that, as in cleverly designed plants, you can recover much of the energy used by using the chill to precool ...


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Energy payback in 1-6 years Taking manufacturing variables into account basically gives you a range of time from 1.25 - 6.5 years based on 5 sunny days out of seven and an average of 6-8 hours of sun per day. But in reality none of this matters, here’s why... Fossil fuels never reach energy payback Electricity as a commodity has been in use for over a ...


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If the "embodied energy" of photo-voltaic tech is ~585kWh/m^2 and it generates ~0.2 kW/m^2 then; the answer to the question seems to be that the photo-voltaic tech will need to run for: ~(585kWh/m^2)/(0.2kW/m^2) hours = 2925 hours to generate it's embodied energy; yes ?


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According to the Wikipedia article on EROI, 585 kWh/m2 is a median value for the embodied energy of a photovoltaic panel, rated based on surface area. The "energy invested" critically depends on technology, methodology, and system boundary assumptions, resulting in a range from a maximum of 2000 kWh/m² of module area down to a minimum of 300 kWh/m² with a ...


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TL;DR -- The best option, per liter, is tea. Soda is about twice as "bad," and coffee is two times worse than that. To compare the environmental impact of various beverages we need to perform a life-cycle assessment. From Wikipedia: Life-cycle assessment (LCA, also known as life-cycle analysis, ecobalance, and cradle-to-grave analysis) is a technique to ...


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Sustainability isn’t just about energy. It also involves other pollutants and water usage. Tea uses 100 times the volume you drink to be produced. [1] And according to this [2] it takes 65 times the volume of water for one litre of Coke. But that doesn’t take into account the mining of the metal for the can, nor the transport of the Coke can (water for ...


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