Agriculture 7 / NEOM  

Neom claims to be a "blueprint for tomorrow in which humanity progresses without compromise to the health of the planet". It's a $500bn (£366bn) project, part of Saudi Arabia's Vision 2030 plan to wean the country off oil - the industry that made it rich. Covering a total area of over 26,500 sq-km (10,230 sq-miles) - larger than Kuwait - Neom will, developers claim, exist entirely outside the confines of the current Saudi judicial system, governed by an autonomous legal system that will be drafted up by investors.

The mega-territory will include a 170km (105m) long city, called The Line, which will run in a straight line through the desert. If that sounds unlikely, it is explained that the Line will be built in stages, block by block. "People say this is some crazy project that's going to cost gazillions, but it's going to be built module by module, in a manner that meets demand," he says. Much like Barcelona's traffic-free "superblocks", he explains that each square will be self-sufficient and contain amenities such as shops and schools so that anything people need will be a five-minute walk or cycle away. When complete, travel along The Line will be via hyper-speed trains, with the longest journey "never more than 20 minutes", the developers claim. What's more, Neom will be home to Oxagon, a city floating on water spanning 7km (4.3 miles) - making it the largest floating structure in the world. Neom's chief executive, Nadhmi al-Nasr, has said the port city will "welcome its first manufacturing tenants at the beginning of 2022".

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