As our planet faces unprecedented environmental crises, it's becoming clear that piecemeal solutions can't fix the problem. We hear about transformational change, and how we might get there. UNDP chief Achim Steiner speaks to whether it's possible to decouple progress from environmental damage, and we look at "degrowth" as an alternative. Plus, the trees of Philadelphia.
Producer/Presenter: Sonya Diehn
Studio director: Eliane Guirlarducci
Studio technician: Jürgen Kuhn
Production assistant: Natalie Muller
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