The Earth only has a limited supply of fresh water; eventually, we will have to use ocean water. We will purify ocean water thro
ugh a process called desalinization. Currently, it is not profitable to purify ocean water. How would this change in the future? The risk of running out of water could mean that it becomes more profitable to purify ocean water.
Water could become expensive, and then it would become profitable to purify ocean water.
It takes a lot of energy to purify ocean water, but if people are willing to pay a lot, then it will become profitable.
Salt is effective as a preservative because it reduces the water activity of foods. Adding salt to foods can also cause microbial cells to undergo osmotic shock.
