‘Audacious’ Solar Impulse airplane showcases power of clean energy
Calling it an "audacious, historic and transformative expedition," Ban Ki-moon visited the Solar Impulse aircraft as it awaited the next leg of its worldwide, solar-powered journey.
Calling it an "audacious, historic and transformative expedition," Ban Ki-moon visited the Solar Impulse aircraft as it awaited the next leg of its worldwide, solar-powered journey.
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