It's certainly possible, since earth doesn't need much external input other from...

		chronolitus on July 9, 2019 \| parent \| context \| favorite \| on: Temperatures in France cross 45°C threshold for fi... It's certainly possible, since earth doesn't need much external input other from sunlight to sustain life. The question is, how scaled-down a self-sustaining ecosystem can we create and manage, which is capable of sustaining human life?