The long race toward the ultimate environmentally friendly city (emission-free communities and carbon-neutral cities) is just getting started, with many projects yet to break ground.
Some likely will never make it off the paper they’re printed on. And, of course, there are competing definitions of exactly what constitutes true carbon neutrality. Take a look here at some of the proposed ideas, from a small hydrogen-powered community in Denmark to a vast development on Chongming Island in China that will have a population of 500,000 by 2050.
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