Have you considered ruling out #1 because the original makes no mention of clothes, food, houses etc?
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langtravelerNo I haven't. You mean one cannot regard the original sentence as having #1 meaning?Right. The original sentence should read There is more than sufficient water to sustain everybody, and would imply #2, We have spare water, but would not suggest anything like #1.
langtravelerSo 'more than' modifies 'sufficient,' not water, right?Yes.
langtraveler1. To sustain everybody, we not only need water but also clothes, food, or houses... etcThis means: