When population scientists made the prediction that London would have up to 10 million residents by the year 2050, the city established the long-term framework known as “London Environment Strategy” to prepare for the upsurge and strengthen the environment in preparation. The plan is for the city to be the greenest global city by then, and work has been going on for about a year.

That strategy mirrors similar approaches taken by Xi’an, which is a new megacity in China with populations above the 10-million mark. The city is known for its rich history and culture which spans over 1,000 years serving as the capital of China over 13 dynasties and hosting the famous Terracotta Warriors. It was also the initial city in the Chines One Belt and One Road national program.

Over the past 15 years, the city has been working on a complete ecological overhaul under the “River Chief System” in the Xi’an Chanba Ecological District (CBE). The system employs the administration of direct regulation to guide the citizens, companies, and government of the area on the path to environmental sustainability.

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