So transporting gloopy oil is far more profitable than shifting lighter-than-air gas.

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Fuel cells also recharge quickly on a boost of gas, much the same way a cigarette lighter gets refilled.

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Royal Dutch Shell also reported declines in their fourth quarter profits, and blamed lighter European demand, lower natural gas production (Exxon) along with a high demand for equipment and skilled workers and the difficulties involved in tapping reserves in politically unstable regions (Shell).

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