Last month, the world came to Copenhagen to focus on how to achieve the Sustainable Development Goals (SDGs) for girls and women. The Women Deliver Conference, the largest gathering on girls’ and women’s health and rights in the last decade, was a huge success. Convening over 5,700 likeminded people from 169 countries was important to reenergize the movement and inspire action. Preaching to the converted is sometimes important. But now it’s time to focus on those who are not yet converted.

How will the 10 billion people expected to be living on Earth by 2050 obtain sufficient and nutritious food? This is one of the greatest challenges humanity faces. Global food systems must supply enough calories and protein for a growing human population and provide important micronutrients such as iron, zinc, omega-3 fatty acids, and vitamins.

As early as 1911, coal miners in Britain carried caged canaries into mining pits. Any sign of distress from the small birds, which are incredibly sensitive to the presence of harmful gases such as carbon monoxide, meant immediate evacuation. Today’s canaries in the coal mine are low-income, minority communities whose exposure to environmental risks in the United States and elsewhere puts them at the frontlines of the global climate crisis.

Anyone visiting Singapore, as I did recently, quickly realizes it is exceptional. A tiny, rich, stable city-state of nearly 6 million people perched uneasily in a region of sprawling mega-countries full of poverty and instability, it also a thriving free market trading and financial center that is meticulously planned and where 80 percent of people live in public housing.

After more than a decade studying the wide-ranging effects of poor nutrition on children, former Wall Street Journal reporter Roger Thurow is outraged. Now he wants to inspire action.

Population, reproductive health, and environmental sustainability are inextricably linked. Growing populations place increasing demands on the environment, while meeting the reproductive health needs of populations usually slows their growth. Often, however, policymakers, scholars, and journalists discuss these issues separately, as if unrelated.

In the southwestern part of Indonesian Borneo, known as Kalimantan, there’s a small town on the outskirts of an incredibly diverse forest where the community has turned from illegal logging to stewards of the land.

Over the past decade, the number of undernourished people around the world has declined by around 167 million, to just under 800 million people. However, this positive trend glosses over a stark reality: Food insecurity is increasing in the world’s mountains. This pattern has been under-recognized by development experts and governments, a dangerous oversight with far-reaching social and environmental repercussions.