The question has been raised whether it can be concluded that for a given level of output, Delta's operation now causes less fossil fuel to be consumed than it did formerly.

有人提出，在给定的产量水平上，能否得出这样的结论：达美航空现在的业务消耗的化石燃料比以前要少。

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They found that the aircraft consumed as much as 15% less fuel (coupled with a reduction in carbon dioxide output).

他们发现，飞机消耗的燃料减少了15%（同时二氧化碳排放量也减少了）。

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In the 1970s miners expanded their output, and generating firms built up stocks of fuel, in anticipation of a steady expansion of nuclear power.

上世纪70年代，由于对核能持续增长的预期，矿工扩大产量，发电厂增加燃料储备。

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When it builds a power plant, for example, it sells some of the expected output in the forward market and buys the gas to fuel that output.

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An even bigger threat looms in China and India, which are pushing to receive credits for carbon capture, which strips CO2 from the output of fossil fuel electric plants and traps it underground.

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In all cases, there is no commercial scale output from them, be it hydrogen or fuel from algae.

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