Zero-carbon city
A zero-carbon city is a goal of city planners that describes a significant reduction in carbon use by a city. The term describes a range of carbon reduction, ranging from a city that generates as much or more carbon-free sustainable energy as it uses, to a city that manages greenhouse gas emissions and reduces its carbon footprint to a minimum (ideally 0 or negative) by using renewable energy sources, by reducing carbon emissions through efficient urban design, technology use and lifestyle changes, and balancing any remaining emissions through carbon sequestration.