Companies raising salmon on land face pushback over sustainability and genetic engineering

As demand grows for seafood, the business of fish farming is growing. Companies are raising and harvesting salmon on land, sparking pushback over sustainability and genetic engineering. Science correspondent Miles O’Brien has the second of a two-part look at what’s known as “aquaculture.“ Stream your PBS favorites with the PBS app:  Find more from PBS NewsHour at  Subscribe to our YouTube channel:  Follow us: Facebook:  Twitter:  Instagram:  Subscribe: PBS NewsHour podcasts:  Newsletters: