'Get outta ze cab!'

By Simon Busch, CNNUpdated 21st August 2013
Paris taxi driver
New York City Mayor Michael Bloomberg on how C40 is helping cities take action against climate change.
CNN talks with Johannesburg Mayor Parks Tau about his vision for the South African city's future.
Rooftop gardens to floating homes, CNN looks at how Rotterdam plans to become the world's most sustainable port city.
New York taxi driver
NYC cabbies -- let them tell you a story.
Spencer Plat/Getty
Mogadishu taxi driver
Now, we bet he'd have reason to be cranky ...