Jennifer Ludden reports on various arguments against having kids, faced with certain catastrophic climate change in the decades to come.
For years, people have lamented how bad things might get "for our grandchildren," but Rieder tells the students that future isn't so far off anymore.
He asks how old they will be in 2036, and, if they are thinking of having kids, how old their kids will be.
"Dangerous climate change is going to be happening by then," he says. "Very, very soon."