1: ( CNN ) The Solar Impulse 2 , the experimental plane attempting to fly around the world without using a drop of fuel , has been grounded by the weather in China . 2: Their mission , which the pilots say is aimed at proving the power of renewable energy , and inspiring innovation , has been 12 years in the making . 3: Solar Impulse 2 attempts to prove the power of renewable energy .
1: The Solar Impulse 2 , the experimental plane attempting to fly around the world without using a drop of fuel 2: Their mission 3: Solar Impulse 2