People around the world are demanding clean air — and cities are starting to respond, says electrification advocate Monica Araya. She takes us on a world tour of urban areas that are working to fully electrify their transportation systems over the next decade, shifting to emission-free motorcycles, cars, buses, ferries and beyond. See what a future without the internal combustion engine could look like — and what it will take to get there.

This talk was presented at an official TED conference.