Coruscant became a city world by 100,000 BBY, long before the invention of hyperspace travel. How did they get their food? If the planet was entirely urbanized except for the poles and few landmarks like Manarai Mountains, there was no arable land left. They could have grown somewhere else in the system, but according to the EA and various other sources, the only habitable planets in the system are Coruscant itself, two moons (one not arable) of it and Vandor-3 (another earth-like world), some other moons are used for garbage storage (not arable, too). How can two planets provide enough food for hundreds of billion (minimum population for a nearly completely urbanized planet) people? Did some of the other worlds be inhabitable/arable back then?