Before we declare "diminishing returns" ...

Before, before... we need a "good model" eh?
Just like more climate "studies", as long as there is no "math" no need to worry!
Still spitting your usual garbage.

P.S. Thanks for only rehashing the same crap again and again, that spares me the effort to rewrite my responses and remove any doubt about your real purposes.

Who needs a model when you can feed on irrational fear, eh?
irrational fear...

How difficult is the "model" of subtracting from a finite quantity?
It is the faith in phantom ressources which is irrational, you criminal cretin!

It is irrational to think that subtracting a finite quantity trumps everything else, every time.  You are responding to a thread in which a water expert says (a) that we face wide problems, but (b) we might be able to shrink our use and stay within our (winding up for good typing here) budget.

Basically the "finite quantity" stuff is what supports a sort of irrational "peak everything" worldview.

(We may be at peak-somethings, but for goodness sakes, figure out what those things are and address them rationally.)