The original version of this article, by Nadya Ivanova, appeared on Circle of Blue.

The horizon gleams with a golden hue from the wheat fields that spread in all directions here in Shandong, a prime food-growing province on the lower reaches of the Yellow River. As hundreds of farmers spread the wheat like massive carpets to dry on country roads, combine machines are busy harvesting the grain. The same afternoon that the wheat harvest is finished, farmers will already be planting corn and other crops. This is how China feeds 1.4 billion citizens and millions of livestock.

Does access to quality water and sanitation have an effect on maternal health outcomes? That was a surprising topic of discussion on day one of the second-ever Global Maternal Health Conference hosted this week in Arusha, Tanzania.

Surprising because, to be honest, I did not think there would be strong disagreements over the relationship between water and sanitation (WASH) and maternal health. In my work with the Comparative Urban Studies Project, the two seem to be clearly linked.

The Wilson Center Policy Briefs are a series of short analyses of critical global issues facing the next administration that will run until inauguration day.

Seven billion people now live on Earth, only a dozen years after the global population hit six billion. But this milestone is not about sheer numbers. Demographic trends will significantly affect the planet’s resources and people’s security.

High mountain regions face grave environmental challenges with climate change impacts already as severe as any place on earth. Temperature increases are expected to be greater at higher altitudes than at sea level, and glaciers and snowfields are retreating in many areas, increasing the risk of catastrophic glacial lake outburst floods, affecting fresh water supplies for hundreds of millions of people, and exacerbating territorial and natural resource disputes.

Despite progress over the years, Ethiopia’s Guraghe zone, located in the Southern Nations, Nationalities, and People’s Region, faces many development challenges. As senior monitoring and evaluation officer in the Guraghe People’s Self-help Development Organization (GPSDO), I have been working in this region for more than five years trying to reduce poverty and improve socio-economic development. The organization as a whole has been here for more than 50.

It is well known that public health issues that affect the world’s most vulnerable populations – food insecurity, maternal and child health, water- and sanitation-related disease, and resource scarcity – are inextricably linked. Where these linkages are strongest, experience on the ground has shown that community-based integrated approaches to development provide more effective and sustainable solutions over vertical, sector-based programs. But so far, there are very few comprehensive evaluations providing strong quantitative evidence of this advantage.

1.8 million food producers using improved technologies or management practices. Nearly 9 million children reached through nutrition programs. 2.4 million hectares under improved technologies or management practices. New mechanisms for donor coordination. A forward-looking agricultural research agenda. Innovative private-sector partnerships to support smallholder farmers. These are among the successes reported for the first three years of Feed the Future, the U.S. government’s new global hunger and food security initiative.

The future is urban – but is it sustainable?

For decades – centuries, really – warnings have been issued: The burgeoning human population will outgrow the planet’s capacity to sustain us. The formula seems simple. More people equals fewer resources and greater environmental damage.