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With gasoline, for instance, this calculation would include energy costs related to oil exploration, drilling, refining, transportation, and the infrastructure that supports each step of the process.With coal-derived electricity, the calculation would include the life cycle from mine to power plant to electric grid.Declining oil field productivity has brought the average net energy ratio for conventional oil down to approximately 20:1 globally, with more remote or hard-to-refine oil significantly worse.

She was extremely surprised, when he told her to get naked and just five minutes later she already trembled with fear feeling his stiff cock drilling her pussy.He pushed her onto the table, torn her shirt and thrust his cock between her clenched lips.Having enjoyed her mouth he started banging her in the doggy style and then stuffed her throat with hot cum and left her laying down and crying with a bottle thrust in her stretched pussy.For example, when tallying the energy required to build a solar photovoltaic panel, what should be included in the accounting?The energy needed to mine the bauxite for the aluminum frame?

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