World population continues to grow. The latest UN projections, released this week, indicate that we will add another 2 billion people to the planet by 2050 and 3 billion by the end of the century.  While population growth is ebbing in many countries—and even starting to contract in a few—population growth in some countries remains brisk, if not breakneck. 

It is important to take an inclusive and tangible approach to protecting civilians by protecting the environment during armed conflicts. In recent decades, the link between conflict, the environment and the protection of civilians has become painstakingly clear. From Iraq to Ukraine, Libya to Yemen, dozens of incidents have surfaced where environmental damage resulting from conflict has led to acute or chronic health risks to civilians and their communities, undermining their socioeconomic development.

How do we plan for disasters that have never occurred before? One million species are at risk of extinction in the near future from environmental changes. The frequency of historic tropical storms is increasing. The rapidly melting permafrost in the Arctic is placing unprecedented pressures on northern infrastructure. Given the overwhelming and unpredictable nature of new disaster risks, it is not clear what the appropriate responses should be. Our book, Disaster Security: Using Military and Intelligence Planning for Energy and Environmental Risks, addresses how to assess unique environmental hazards and disaster risks, based on tools used by the U.S. intelligence and military communities. The book draws on lessons learned from developing, applying, and translating scenarios and simulations (or wargames) to plan for future environmental security risks.

In parts of the tropics, exposure to extreme temperature or rainfall in early life is associated with fewer years of schooling in later childhood. This finding comes from my new article in the Proceedings of the National Academy of Sciences, with coauthor Clark Gray. As climate change leads to increasingly severe heat waves, floods, droughts, and hurricanes, it is important to understand how extreme weather impacts kids’ education in different parts of the world. This will help decisionmakers develop solutions to keep children in school in a world of increasing climate variability.

As Arctic ice melts, we can physically see glaciers retreating. But what we can’t yet see is the exact effect climate change will have on the environment, humans, economies, and national security. Less ice for longer periods each year will likely bring opportunities and related challenges as Arctic and non-Arctic states jockey for position.

As we move past another Earth Day, environmentalists may be forgiven for assuming that little has changed. The best available evidence points to a rapidly changing climate, declining biodiversity, and fisheries on the verge of collapse. To further complicate matters, the political will to reverse these trends is being stymied by a surge of anti-environmental populism in America, Brazil and elsewhere. When coupled with the continued harvesting of natural resources by big multinational corporations, it is easy to see why environmentalists are crying into their organic kale and quinoa bowls.  

With rapidly aging populations and rising levels of female employment, the United States and other wealthy nations are facing unprecedented demands for non-familial care. These nations vary in their ability to address such demands. Those with more robust welfare states, including publicly supported, high-quality child care and elder care services and facilities, are generally able to meet growing needs for care, while those with weaker welfare states experience severe “care deficits,” leaving families with few alternatives. Increasingly, in the United States and elsewhere in the developed world, families are turning to migrants—usually women—to solve their care dilemmas.