Global markets are failing our planet, according to Europe's Environment Commissioner Janez Potocnik. This week on One Planet, the commissioner argues that we don't put enough value on our ecosystems, clean water or fresh air, and that a "fundamental rethink" is now needed to keep the world in a sustainable shape.
Also on the show we speak to Deyan Sudjic, one of the UK's leading thinkers in urban design, to talk about urban growth and his new book Living in the Endless City - and we ask where you'd put a million extra people in Beijing, Lagos and Los Angeles. Plus, we take in the view from the top of Eiffel Tower in Paris.
As ever, tune in, have a listen and then let us know what you think. Email the team at email@example.com, or join in the conversation on our Facebook page - the link's below.