Below a discharge from a wastewater treatment plant, an 8.6-km stream has are oxygenation constant of 0.4 day', a velocity of 0.15 m/s, a dissolved oxygen concentration of 6 mg/L,

and an ultimate oxygen demand (L) of 25 mg/L. The stream is at 15°C. The deoxygenation constant is estimated at 0.25 day'. a. Will there be fish in this stream? b. Why should we care if there are fish in the stream? Do the fish deserve moral consideration and protection? What arguments can you muster to support this view?