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In the third of Click's special shows about the ways in which tech can help save the planet, we focus on construction - one of the biggest carbon emitters. We look at efforts to rethink building from the ground up. In Sweden, attempts are being made to manufacture CO2-free steel. In Finland, robots can help recycle building materials. And in Orkney, we witness the latest developments in making energy from sea waves.
Sorry, we have not watched this yet.