Explorer and aviator Bertrand Piccard

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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)