More at http://philosophytalk.org/shows/it-wrong-wreck-earth.

There are too many people, doing too much damage to the ecosystem, essentially guaranteeing that future generations will have a damaged Earth, and will have to invest incredible amounts of time, money and labor to repairing what can be repaired. But future generations are made up of people who don't yet exist – what obligations do we have to them? And what obligations, if any, do we have to our fellow fauna and the flora we all depend on? Ken and John welcome environmental ethicist and celebrated author Kathleen Moore from Oregon State University.