Bill Gates is building his own, brand new city

Bill Gates is set to build a new "smart city" with a population of almost 200,000 people. Belmont Partners, an investment firm run by the Microsoft co-founder has invested $80 million (£61 million) in the project, which will be "forward-thinking" and have "cutting-edge" technologies at its core. It has purchased 24,800 acres of land, which will be used for schools, housing, offices and commercial and retail space. Mr Gates' futuristic city will be built in southwestern Arizona, and will be called Belmont. It will have 80,000 residential units, says Belmont Partners, which will give it a population of around 182,000.