Achieving a groundbreaking global agreement, COP21 was an important step towards limiting the impacts of climate change. However, as The Dirt writes, it was only a starting point. Now is the time for action. And cities have a major role to play in climate adaptation and mitigation success. Transportation accounts for the second largest share of energy-related emissions and is a sector that presents a major opportunity for improvement. Disruption to car-oriented planning, particularly in secondary cities, would have a major impact on CO2 emissions and can also be a major employment driver, as we’re seeing around the world, from Copenhagen to Bogota. This isn’t about finding silver bullets, but on the ground solutions, like enhancing street-level connectivity, investing in public transit and establishing policy that supports shared transportation. Sustainable urban mobility is a catalyst for green and economic success – if cities harness the opportunity.