The city’s economic success depends on its density. But density also allows contagious diseases to spread. Looking at how the city has managed this conflict in the past could shed light on what the future holds.

High-resolution data on impervious surfaces and urban extents can shed new light on patterns of urban and rural development.

Sunny California may be getting too sunny. Increasing summer temperatures brought on by a combination of intensifying urbanization and warming climate are driving off once-common morning cloud cover in southern coastal areas of the state, leading to increased risk of wildfires.

In a new study, researchers have mapped out a large variety of discarded pharmaceuticals dissolved throughout the Hudson River. They say that in some places, levels may be high enough to potentially affect aquatic life.

The newest cohort of MPA Environmental Science and Policy students went on a field trip to the Gowanus Canal in Brooklyn with professors Benjamin Bostick and Michael Musso to learn about the challenges of a dense mixed-use urban landscape.

Kartik Chandran, an environmental engineer at Columbia, will discuss some of his urban wastewater treatment projects at a panel discussion Friday following the screening of a new film about Rio de Janeiro’s Guanabara Bay.

Are you a full-time Columbia graduate student interested in urban sustainability and equity? Do you have superb writing, analytic and research skills? Apply by December 9 for this part-time research assistant position.

Cities are leading the fight against climate change. Here’s what some of the most forward-looking ones are doing.

Our cities can bring us together in wonderful shared experiences; now it’s time for our political processes to reflect rather than refute that reality.