Is water cost-effective or not? explain.?

Question

it's for a project.

Answer 1

Cost effective compared to what?  And of what useage?

Answer 2

Kinda depends on what purpose you  have for it, doesn't it? Water makes a lousey fuel. But it's great for keeping plants and animals alive.

Answer 3

Water is not cost effective if we get too little benefit from it. If we need it and use it well, it will be cost effective, simply because there is nothing more costly than needing and not having water.