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Apr
23
2010
Plane-free skies over Europe during Iceland's volcanic eruption may yield rare clues about how flights stoke climate change, adding to evidence from a closure of U.S. airspace after September 11, 2001, experts say
Jul
8
2009
The world's first piloted aircraft capable of taking to the air using only power from fuel cells took off in Germany Tuesday, producing zero carbon dioxide emissions, its makers said
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