More and more cities are switching to LEDs to save money and, ultimately, the planet. But ecologists are worried about this trend. Dr. Chris Kyba explains why on a night walk through Cologne, one of Germany's brightest cities.

Deep Dive: Bright lights, big, LED cities

Deutsche Welle is Germany’s international broadcaster that produces television, radio and online content in 30 languages. It provides a European perspective to its global audience and promotes intercultural dialogue. Channels are in English.

Share Deep Dive: Bright lights, big, LED cities

Sign up to save your podcasts

Deep Dive: Bright lights, big, LED cities

Deep Dive: Bright lights, big, LED cities