what environmental factors are necessary to sustain human life?

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Air oxygenated at the appropriate percentage, fresh and clean water, the resources to build shelters, hunt or grow food, and make warm clothing.

2006-08-05 08:43:37 · answer #1 · answered by rita_alabama 6 · 0⤊ 0⤋

clean air and fresh water

2006-08-03 08:19:04 · answer #2 · answered by witchfromoz2003 6 · 0⤊ 0⤋