Airplanes release greenhouse emissions into the atmosphere and require enormous amounts of fuel to fly. A Boeing 747 can consume up to five gallons of fuel per mile. But what if planes could be powered by electricity? Though they won’t replace passenger airliners anytime soon, small, zero-emission, electric planes are flying today.
Engineers have been pursing electric flight for decades. In 1979, the Solar Riser became the first manned electric aircraft to fly. It used photovoltaic
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