. - [glennis] if somebody had said to me "we're going to make a living space "out of a parking space,ld've said, "cool." - [joe] the future, it's coming to where you live. next, on earth 2050. hi, i'm joe penna, and welcome to earth 2050. at last count, more than half of the world's population lives in cities. here is los angeles, the population averages about 8,000 people per square mile. in manhattan, it's close to 70,000 people.