1) Cost, which are very expensive and can be prohibitive, especially for poor countries.
2) Environmental impact (will lots of fish or marine life die?). The "left" will fight this idea based on this one aspect.
3) Other ways, including better conservation of water already available, are better.
4 ...

Nomad, I actually found Risklamas post helpful. I think. Lets see if it works.I did get it to work once anyway.
Not that I see it mattering which a person "clicks" on a link or pic.

I want to say that an essay is a type of task from a teacher that does not allow borrowing from books, Internet sources, periodicals, etc. Only personal quotes are allowed, and then in very small amounts. Because of these conditions, small work (3-5 pages of printed text) often causes students no ...