People and Pixels 20 years later: the current data landscape and research trends blending population and environmental data

The authors outline the key extensions of the National Research Council's People and Pixels foundation since 1998.  The article highlight several breakthroughs in research on human–environment interactions. It also identify pressing research problems—disaster, famine, drought, war, poverty, climate change—and explore how interdisciplinary approaches integrating people and pixels are being used to address them.