Read more from Horizons

With the global population projected to reach 8 billion by 2025, and 2 billion people expected to move into cities and other urban areas over the next 20 years, sustainable development and living are increasingly to our future.

China is taking the lead, building what has been described as the world’s largest eco-city.

Adam Shaw visits Tianjin Eco-City - under development in north east China - to see how it plans to balance urban expansion and the the impact on natural resources and the environment.

In other episodes of this series, Saima Mohsin meets a property developer in India, who has his sights firmly in the future of sustainable housing development, and Adam  meets the man who coined the phrase “eco-city” – to find out what exactly it means.

If you would like to comment on this video or anything else you have seen on Future, head over to our Facebook page or message us on Twitter.

Around the BBC