A zero-carbon city runs entirely on renewable energy; it has no carbon footprint and will in this respect not cause harm to the planet. Most cities throughout the world produce energy by burning coal, oil and gas, unintentionally emitting carbon. Almost every activity humans do involves burning one of these fossil fuels. To become a zero carbon city, an established modern city must collectively reduce emissions of greenhouse gases to zero and all practices that emit greenhouse gases must cease. Also, renewable energy must supersede other non-renewable energy sources and become the sole source of energy, so a zero-carbon city is a renewable-energy-economy city. This transition which includes decarbonising electricity (increasing the importance of the sources of renewable electricity) and zero-emission transport, is undertaken as a response to climate change. Zero-carbon cities maintain optimal living conditions while eliminating environmental impact. Instead of using established cities, many developers are starting from scratch in order to create a zero-carbon city. This way they can make sure every aspect of a city contributes to it being carbon free.
There are two places that are prototyped to become zero-carbon cities: Masdar City, United Arab Emirates and Dongtan, China.Malacca also has a stated ambition to become a carbon-free city, with a Low Carbon Cities programme being piloted in Malaysia as of 2014. Once created these cities will become living examples of sustainable development, which demonstrate optimal resource utilization.
One of the world's first zero-carbon cities, called Masdar City, is being constructed in the Gulf emirate of Abu Dhabi, it is set to house 50,000 people. Construction began in February 2008. The desert city is designed to be powered entirely with renewable energy, including solar power and wind power. The Masdar Initiative is an environmental urban ambition by Foster + Partners to develop a sustainable city where residents would enjoy a carbon and waste-free environment. The 6 million square metre project is based on the principles of an ancient walled city, combined with modern alternative energy technologies.