China's Drive Toward Carbon Neutrality

Building 220 cities is a massive undertaking. It will take a vast infrastructural effort which will see China construct 50,000 skyscrapers and 170 completely new mass transit systems, the equivalent of more than 'ten New Yorks.'

This will all come at a great cost, so it's imperative that these cities are served by clean energy and sustainable food sources. Alex Steffen charts China's progress so far and its plans for the future.