They are especially out of touch with reality. Urban living is killing delta smelt, by concentrating our waste and dumping it into the rivers. No fish will ultimately be able to survive this insane urbanization scheme. Our wastes have historically gone on the land, where they belong, to be consumed by vegetation.
If we live in dense cities, we're going to have to get along without any fish in our streams. People are led to believe that sewage treatment plants can clean the water sufficiently, but that is impossible. No fish can live for more than a few days in even tertiary effluents. This is because of chloramines, trihalomethane, and nitrosamines. Attempts to remove them result in even more toxic byproducts.
I guess they never read Genesis 1:28, not to mention Genesis 2:5, 2:15, or 3:16, never mind Leviticus 25 & 26.
Oh well, maybe they'll get a clue when we start to see the equivalent of Deuteronomy 28.