Mono Lake, in California, is about twice as saline as ocean water. Very few species can survive there for long. The exceptions are an algae, brine shrimp, and alkali flies. Mark Twain found Mono Lake to be a “lifeless, treeless, hideous desert… the loneliest place on earth.” (Wikipedia)
Brine from gas wells is six to ten times as saline as ocean water.*
And nobody knows how to treat or dispose of it safely.
*”Clinton (OH) brines have 175,000-210,000 parts per million of sodium. For comparison, ocean brines have only 18,000-35,000 ppm of sodium.” See Expert: “The industry has too little concern for …….. public health, for our groundwater resources, and for facts.”