By one measure, bringing down consumption of energy to 1950s levels is consistent with more sustainable consumption patterns. In 1998, the 2000-watt society vis

By one measure, bringing down consumption of energy to 1950s levels is consistent with more sustainable consumption patterns. In 1998, the 2000-watt society vision was introduced by ETH Zurich as sustainability target. Interestingly, Switzerland [fixed] surpassed 2000 watts per person per day in the early 1960s. See: https://en.wikipedia.org/wiki/2000-watt_society#:~:text=The%202000%2Dwatt%20society%20is,48%20kWh%20per%20day)%20by https://en.wikipedia.org/wiki/2000-watt_society#:~:text=The%... One way to be sure one is not contributing to environmental degradation would be to live in an artificial biosphere, but those have not worked for long periods of time. The lack of such a closed-loop system in Earth limits our potential for long-term habitation in space.