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This spring, the Eagle County Regional Airport near Vail, Colorado, began offering the fatty jet fuel sourced from unwanted livestock tallow. It's a so-called sustainable aviation fuel with a lower carbon footprint.
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The Obama administration wants states to cut back on carbon emissions, but doing that has always been a thorny problem. While carbon is a byproduct of…
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What if the vast stands of beetle-killed trees in the west could be turned into gasoline? A recently-announced federal project involving several…