Tracing the source of illicit sand—can it be done?

If you've visited the beach recently, you might think sand is ubiquitous. But in construction uses, the perfect sand and gravel is not always an easy resource to come by. "Not all sand is equal in terms of what it can be ...

Global urban growth typified by suburbs, not skyscrapers

To many people, the term "urban growth" connotes shiny new high-rise buildings or towering skyscrapers. But in a new analysis of 478 cities with populations of more than 1 million people, researchers at the Yale School of ...

Green growth that works

Economic development plans often overlook a crucial detail—ecosystems that provide essential services to people. Increasingly, though, leaders in academia, finance, sustainable development and the private sector agree that ...

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