They want us to live in fish aquariums, controlled by them. "Renewable and Sustainable! will be the boob-bait. Greta T. will be a leading advocate.
A "Line City" where, by "accident" (or on purpose) they can "forget" to keep the tank clean, or feed the fish, or keep it in the right temp range, etc.
"CONTROLLED BY AI! What could be better than that!
"Saudi Arabia To Build A New 105-Mile-Long Linear Zero Emissions City" 
Wouldn't they be better off building a tower tall enough to reach Heaven? They could call the place "Babel" ...
"It will be home to more than 1 million people
No ... it will be a concentration camp to more than 1 million prisoners.