Humans on Earth generate 1.2 billion metric tons of trash each year. How much will that change offworld?
) 1 million people. That’s a large enough population for us to assume that this settlement’s economy supports an amount of consumerism, as well as all the critical needs of this many souls for water, food, clothing, domestic items, and even entertainment. This is much more than a science outpost.
that four astronauts on a yearlong mission can generate around 2.5 metric tons of dry garbage. At 0.63 tons per person, that is only a little better than a typical earthbound American’s production.A major issue is that the ISS doesn’t make its own supplies, so despite severe weight constraints due to the cost of rocket launches, everything has to be shipped in cargo craft, encased in packaging, and is not really designed for repurposing.
Of course, a functioning million-person society on Mars will have to have some manufacturing capabilities, and efficiency will demand more extensive recycling methods, and could limit things like packaging . All of which could, and should, make it much more efficient than the ISS. But even if our Martian settlement could reduce its waste production by factor of 100 that would still mean thousands of tons of garbage per Earth year to dispose of.
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