Click here to access my latest article in The Conversation, How green is your city: towards an urban sustainability index, that discusses metrics used to assess the ecological, carbon and water footprint of cities. As we transition into a more urban future, measuring, assessing and evaluating urban environmental impact of cities is of major importance. We are only just beginning the difficult task. We need to refine these metrics, develop new ones and so create a standardized and easily understood index of city sustainability. With better data and a standard index, policies can be evaluated, targets set and institutions held to account. A robust city sustainability index would benchmark where we are now and provide a measure of progress in the future.
A visualization of the daily carbon emissions of New York City. Each bubble represents one ton of CO2.