Sen. Bernie Sanders was asked if he'd make curbing population growth through birth control a key part of his climate plan.
"The planet cannot sustain this growth," the voter said while asking the question.
Sanders said he would, and turned the conversation to women's rights.
"Women in the United States of Americas, by the way, have a right to control their own bodies and make reproductive decisions," he said.
"And the Mexico City agreement — which denies American aid to those organizations around the world that allow women to have abortions or even get involved in birth control — to me is totally absurd. So I think, especially in poor countries around the world where women do not necessarily want to have large numbers of babies and where they can have the opportunity through birth control to control the number of kids they have, it's something I very strongly support."