**5. Conclusions**

In the present paper, we have defined: the most efficient desalination technology, energy supply sources, corrective measures for environmental impacts, and the most suitable type of contract for the construction of large desalination plants compatible with sustainable development. A discussion was also included for every corresponding point of each of the analyzed factors, their evolution, and present situation.

Considering that the main question is to guarantee the supply of water in quantity, quality, and safety to millions of people, the proposals made below offer sufficiently argued solutions. The technological developments in this field have evolved and still do very fast, so it is reasonable to expect significant improvements in the near future.

However, today, the recommendations and conclusions are the following:


energy production parks, fundamentally solar or wind farms; even if it is utopian to think of a plant today producing hundreds of thousands of cubic meters a day, through the exclusive supply of renewable energies;


**Author Contributions:** Author Contributions: Conceptualization, F.B.-F.; Investigation, F.B.-F.; Methodology, F.B.-F., A.L.-G.; Writing—original draft and editing, F.B.-F.; Formal analysis, F.B.-F.; Writing—review, A.L.-G.; Supervision, A.L.-G., M.B.M.-M.; Validation, M.B.M.-M. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
