2006-06-29 07:30:15 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
I assume you mean for humans.
Air (particularly Earths air mixture of oxygen, carbon and nitrogen), Water, and plants. We couldn't survive long if any of the three did not exist.
2006-06-29 07:35:31 · answer #1 · answered by xdwcpsd 3 · 0⤊ 1⤋
Water, Food, Air
2006-06-29 07:34:25 · answer #2 · answered by briana_lf08 2 · 0⤊ 0⤋
Air, Water, Soil
2006-06-29 07:33:17 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋
Earth, Wind and Fire.
Do you remember.. the 21st night of September...
2006-06-29 07:38:22 · answer #4 · answered by bequalming 5 · 0⤊ 0⤋
Oh yeah...soil and food are great resources.... sheesh!
How about hydro (such as wave action), wind and solar resources. All three very basic and easily harnessed.
2006-06-29 07:36:38 · answer #5 · answered by YDoncha_Blowme 6 · 0⤊ 0⤋
Earth, air, and water
2006-06-29 07:33:38 · answer #6 · answered by cookie78monster 4 · 0⤊ 0⤋
the elements, earth, fire, wind,and water
2006-06-29 07:35:13 · answer #7 · answered by Anonymous · 0⤊ 0⤋