The magnitude of energy consumption is one our primary concerns in the 21st century it hinders the progression towards renewable sources of power and is one the factors that make the price of desalination high, essentially the crux of stopping global warming is finding a solution to our energy needs.
Instead of looking for avenues to create more energy we ought to look at how we can make full use of energy resources we already have.
Air conditioning accounts for 45% percent of Israel's energy consumption and 55% of Israel's water is desalinated, if we can more energy economical ways to cool our buildings and desalinate our water our energy consumption could be drastically decreased.
Mangrove trees can teach us a lot about energy efficiency regarding desalination. Mangroves grow on coastal waters and have evolved to survive in brackish waters and have developed incredibly complex methods of desalination, one method is the use of evaporation to create the pressure needed for reverse osmosis. Here in Israel we could make use of the excessive thermal energy and have salt water pipes run along the outside of buildings effectively acting as water cooling infrastructure for buildings as well as providing the means to evaporate the salt water providing the energy needed for desalination. The drawback to this approach is that it would require tremendous of infrastructure to be built and maintained, but then again why expend energy to cool our buildings and desalinate our water when we could do both with some plumbing and the sun.