People & Ecosystems

Since the very first Earth Day more than four decades ago, the environmental movement has tackled a wide range of problems, including air pollution,…

The Gulf of Mexico has the largest dead zone in the United States and the second-largest in the world. Dead zones form when excessive amounts of nitrogen and…

The world is on track to become a very different place in the next two decades. Per capita income levels are rising, the global middle class is expanding, and the population is set to hit 8.3 billion people by 2030. At the same time, urbanization…