has taken up a mission to find such 1,000 efficient solutions since he successfully completed the first zero-fuel electric and solar aircraft's circumnavigation across the globe.
launched the World Alliance for Efficient Solutions at COP23.
The charges were ultimately dropped because Piccard
did not show up to court to testify against her then-husband.
and his team faced many technical problems, especially with the design of the batteries.
The plane, not heavier than a car but having wingspan of a Boeing 747, was being flown on 35,000 km trip in stages with two pilots Piccard
and Andre Borschberg (also Swiss) taking turns at the controls.
This is an historic day for Captain Piccard
and the Solar Impulse team, but it is also an historic day for humanity," said the UN Secretary-General.
and fellow pilot Andre Borschberg took turns flying solo for long days and nights, taking 20-minute naps every two hours.
It was also delayed for more than a week in Cairo ahead of its final flight when Mr Piccard
fell ill, and due to poor weather conditions.
Let's take it further,'' Mr Piccard
said, arriving into Abu Dhabi to cheers and applause.
Summary: The solar-powered plane first took off from Abu Dhabi in March 2015; for the return leg, Bertrand Piccard
is in pilot's seat
That plane flew across the Pacific Ocean, with Piccard
's fellow pilot Andre Borschberg manning the controls for 4 days, 21 hours and 51 minutes as he flew the craft from Nagoya, Japan, to Honolulu in Hawaii.