How cities are detoxing transportation | Monica Araya

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.