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Alex Steffen sees a more sustainable future - the route
Seeing a sustainable future - Alex Steffen
TED: Alex Steffen - The route to a sustainable future
GPC's Chosen TED Talk: The route to a sustainable future. (Alex Steffen)
Leading a more sustainable life: Alex Steffen
Alex Steffen: The shareable future of cities
Alex Steffen: The route to a sustainable future
Alex Steffen on sustainability
TEDxOxbridge - Alex Steffen - Our Future is a Thing of the Past
Alex Steffen: (1of 5) Where We Are And Where We're Going
Alex Steffen - Worldchanging.com
Alex Steffen Keynote - UN High-level Political Forum on Sustainable Development (2018)
