More generally, desalination may also refer to the removal of salts and minerals, as in soil desalination, which also happens to be a major issue for agricultural production. Salt water is desalinated to produce fresh water suitable for human consumption or irrigation. One potential by-product of desalination is salt.
And 6 Fish to Avoid. You probably already know that you're supposed to be eating fish twice a week. Fish are a lean, healthy source of protein -- and the oily kinds, such as salmon, tuna, sardines, etc., deliver those heart- and brain-healthy omega-3 fats you've probably also heard you should be getting in your diet. (Here are seven more of the healthiest foods you should be eating but probably aren't.)
To get a more precise calculation of how often you should eat fish, check out the National Resources Defense Council's Mercury Contamination in Fish - Consumer Guide to Mercury in Fish. Other helpful resources include the New York City Department of Health â Mercury and Fish, the Environmental Protection Agency.