Engineers are developing giant solar-powered flying wings that are remote-controlled and designed to remain aloft at high altitudes for weeks, months, or even years -- nonstop.

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It is developing giant off-shore wind turbines, biomass power plants (including projects in Florida and Washington with Duke Energy), and, with its Ausra acquisition, solar thermal power plants.

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The rest comes from spots like Azerbaijan, Angola, Algeria and Iran, where it weathered a bribery scandal in 2004 and is developing the giant South Pars gas field.

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