What makes it difficult to make drinking water from sea water by using evoporation?

http://www.western-water.com/Acre-Foot_f...

this question doesn%26#039;t really make much sense. If you drink sea water you will get sick becuz of all the salt. If you let the water evaporate salt is all that will be left.

energy costs. The sun evaporates sea water, of course, but to speed up the process, you heat the sea water, which takes lots of energy. Additional energy is expended condensing the water vapor to collect the desalinized water. Grandpa

Corporations make it difficult - not enough profit margin.....

Come on, this can be done, and cheaply too. Hello?? Solar engery to HEAT the water to Steam!! Then reclaim the steam to condense into water. EURKEA!! If i was only as dumb as a scienctist.....

you make salt from sea water by evaporation.

sea water is not just salt
it has a collection of other elements
and it is very expensive to get drinking water from sea water

The whole world would have been doing it by now if it was easy

the main cost is energy so it is easyer to just use fresh water more efficiently.

that%26#039;s what they used to do with desal. then they moved on to membranes which use less power and now they are moving onto vacuum freezing which will use even less power.