The average citizen of Lps lives his or her entire life within a two-mile circuit. We will find viable substitutes for fossil fuels. The problem is congestion. If you need to go somewhere, you must walk, or, better yet, have things and places delivered to you. No one has to go to work.
People live their entire lives, birth to recycling, in the womb of their work.
One will never leave work. We will also learn to make do without yards, gardens, and dairy farms. In Lps, in 2999, the only mammals in evidence are humans. The Lps zoo sports holographic images of all manner of creature, some even fictional. But that's all humans will have for company.