The Ecotopian Solution – R. Crumb
A viable, sustainable human future will, of necessity, be a world in which humans cooperate with natural biospheric processes, not work against them.
A viable, sustainable human future will, of necessity, be a future in which humans do not consume natural resources faster than they are naturally replenished, and do not produce wastes faster than they can be naturally dispersed and assimilated.
A viable, sustainable human future will have no more humans than can be sustained through natural biospheric processes. My guess is about 2 billion humans would be the optimum maximum global population level to allow recovery and continued viability of the biosphere.
A viable, sustainable human future will have a reduced energy demand per capita, produced locally, and used at the site of production. Energy production will be by life-cycle renewable, passive sources. Heating and cooling of homes and businesses, where necessary, with be limited to local resources and locally manufactured and maintained technologies.
A viable, sustainable human future will require far less human transportation. Humans will work where they live, live where they work. Local transportation will be on foot and by human powered vehicles. Regional transportation will be by solar charged electric vehicles and sail craft; long distance transportation, where necessary, will be by solar-charged electric vehicles and sail craft.
A viable, sustainable human future will have a steady state economy, based on local production for local consumption, with limited trade for materials not available locally. Local population and economic growth will be limited by local resource availability. Local food production will require less energy, less irrigation and will be distributed locally through farmers markets and cooperatives.