“Our responsibility is to call attention to the fact that there’s an invisible crisis happening,” says John Welch of Partners in Health in this week’s podcast. “Ebola is a huge issue for women’s health.”

“How does climate change affect people by age and sex, and where they live?” asks William Butz, director of coordination and outreach at the Wittgenstein Center for Demography and Global Human Capital, in this week’s podcast. “And how to do they respond? How do they adapt or fail to adapt?”

“When you turn on the tap in any community in Israel, water will always flow. That’s not the case in Palestine, and it’s not always the case in Jordan either,” says Gidon Bromberg, Israeli director of EcoPeace Middle East, in this week’s podcast.

If you want to understand global population dynamics, you have to look past quantity and look at quality, says Wolfgang Lutz, founding director of the Wittgenstein Center for Demography and Global Human Capital, in this week’s podcast.

“We’re living in a time of unprecedented change,” says Jonathan Foley, executive director of the California Academy of Sciences.

The past year brought not only an end to political instability in Madagascar but a new surge of interest in integrated population, health, and environment (PHE) development, says Caroline Savitzky of Blue Ventures in this week’s podcast.

Technological solutions, like improved equipment and logistical tools, have been trumpeted as keys to finally ending preventable maternal and child deaths. “But it’s not just technology innovation that we need; it is systems innovation,” says Dr. Harshad Sanghvi in this week’s podcast.

Leaders from around the world gathered in New York last month to discuss the replacements for the Millennium Development Goals, which expire next year. The topics included human rights, economic development, justice, disarmament, and terrorism, just to name a few. And that’s a problem, says Genevieve Maricle, policy adviser to the U.S. Ambassador at the U.S. Mission to the UN, in this week’s podcast.