Can Earth Hour produce long-term change?

Each year, millions of people worldwide pledge to turn off or dim their lights for one hour as part of the Earth Hour event. But beyond the symbolic Switch Off moment, how effective are these global efforts? Vivek Kumar, CEO of WWF-Singapore sits down with Julie Yoo to talk about how big an impact the festival has on raising awareness for climate change. See omnystudio.com/listener (https://omnystudio.com/listener) for privacy information.