The original version of this article, by Laura Robson and Caroline Savitzky, appeared on Blue Ventures’ Beyond Conservation blog.

The excitement was palpable as we gathered with almost 200 of the world’s finest population-health-environment (PHE) practitioners, researchers, and advocates in Addis Ababa for the International PHE Conference earlier last month! With all of us working on integrated projects encompassing family planning, community health, sustainable livelihoods, and environmental initiatives, there were many ideas and progress updates to be shared.

Rates of species extinction are so high that some scientists have categorized the current era as Earth’s sixth mass extinction event. In last month’s most popular post, Kathleen Mogelgaard explains that a new study indicates, of all the human factors related to this biodiversity loss, population growth and density may be the strongest. Popular new additions also include a review of former Wilson Center Fellow Jeff Colgan’s Petro-Aggression; the launch of research on urbanization, demography, and climate change adaptation; the UN Foundation’s Alaka Basu on Friday Podcasts talking about re-thinking women’s empowerment; and a brief from the China Environment Forum on China’s distant water fishing fleets.

“Leave enough for everyone.” That’s what my mother used to tell us at dinner. However, the holiday season reminds me that human nature is far from innately moderate in consumption. With Black Friday as a kickoff, consumers will spend more than $600 billion by Christmas in the United States alone. As I witness droves of shoppers running through malls and stores, I wonder if their desire is driven by some insatiable appetite for their favorite products or something more fundamental about human nature.

“Humanity is altering Earth’s life support system. Carbon dioxide emissions are accelerating; greenhouse gas levels are unprecedented in human history,” says a new video summarizing some of the most striking finds of the Intergovernmental Panel on Climate Change’s latest report. The climate system is changing rapidly, and it is “extremely likely,” the video quotes the IPCC, that humans are the central reason why.

Cambodia is a young democracy in transition. It has the highest rate of urbanization in Southeast Asia, but the lowest percentage of current urban dwellers and widespread poverty. The Mekong River, on which millions of rural Cambodians rely, is being dammed at a rapid pace, both upstream, beyond the country’s borders, and within. Aided by weak land laws, both foreign and domestic industrial forces have staked claim to large swaths of the country for logging and rubber plantations, displacing thousands.

To date, despite their demonstrated importance in both conflict recovery and the risk of conflict recurrence, natural resources have been largely ignored or downplayed in post-conflict settings around the world.

I’ve just returned from the International Conference on Family Planning (ICFP) in Ethiopia where integrated population, health, and environment (PHE) programs had a strong showing. More than 16 sessions over three days at the conference incorporated PHE themes, including panels on communicating complexity around family planning, conservation and human rights; how PHE helps accelerate the fertility transition in rural Ethiopia; and meaningful ways of linking population and family planning to climate change and sustainable development in Africa. Blue Ventures, one of PHE’s strongest voices, was given one of the first ever Excellence in Leadership for Family Planning awards. At this global meeting of family planning experts, PHE was clearly and squarely at the center.