Explorer and aviator Bertrand Piccard

What drives an exclusive band of human beings to push beyond the boundaries of existing knowledge and experience? Hardtalk talks to Bertrand Piccard, the renowned explorer and aviator; the first to fly non-stop around the world in a hot air balloon. Right now, he’s using his own experience with solar powered aircraft to encourage sustainable tech innovation, but is decarbonising the global economy a challenge too far, even for this pioneer? (Photo: Bertrand Piccard. Credit: Remy Gabalda/AFP/Getty Images)