🌍 Earth is a biological life raft thatsustains human life in the inhospitable environment of the cosmos. This planetary closed-loop system provides oxygen, water and essential nutrients while recycling waste, purifying contaminants and renewing resources. It does all of this using only the things that already exist in the biosphere. And NASA is learning just how this life raft functions in order to create a portable replica of the biological system we call home. A closed-loop system only uses the resources on hand. In other words, no resupply shipments make it necessary to reuse and recycle everything. On Earth, biology takes care of these processes naturally and efficiently, according to Jitendra Joshi, an engineer based at NASA Headquarters. Joshi studies the systems that sustain human life in space, such as microbiological systems for waste treatment for long duration space missions. A closed-loop system only uses the resources on hand. “The water we drank this morning...
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