There is a very logical progression of basic human needs. Without oxygen, a human will die in less than an hour. We need clean breathable air. Without water, a human a will die in less than a month. We need clean drinkable water. Without food a human will die in less than a year. Shelter is trickier because people can die of exposure and hypothermia in a matter of hours, but may be able to survive without it.
- Air for profit
- Water for profit <- This exists
- Food for profit <- We are here
- Shelter for profit
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