Where biodiversity, climate risk, and urban growth collide

A project led by researchers at The Ian L. McHarg Center for Urbanism and Ecology aims to highlight points of conflict between climate risks, biodiversity, and urban growth in a few of the world’s poorest cities.

From the Weitzman School of Design

Goodbye to an iconic tree

More than a century old, the American elm located in the heart of the Quadrangle residences has been ailing and is due to be removed the week of July 25. The site will be replanted at a later date with three native white oaks.

Katherine Unger Baillie

Protecting a singular ecosystem in the Galápagos

Michael Weisberg, the Bess W. Heyman President's Distinguished Professor of Philosophy, students, and Ecuador's Ambassador to the United States reflect on the momentous expansion of the Galápagos Marine Reserve.

Blake Cole

In the News


Wealthy American homes have carbon footprints 25% higher than low-income residences, study says

Vincent Reina of the Stuart Weitzman School of Design said that the large homes owned by wealthy people require excess energy, but that low-income homes may also produce significant emissions because of the high cost of energy-efficient renovations and new appliances.



How to grow green

Daniel Aldana Cohen of the School of Arts & Sciences has proposed that grants be made to help replace aging utility systems in low-income and public housing.


WHYY (Philadelphia)

Not over the hill: ‘Design With Nature,’ Ian McHarg’s landmark book of ecological design turns 50

Bill Whitaker of the Stuart Weitzman School of Design spoke about Penn landscape architect Ian McHarg’s influence on ecological design and city planning. “He realized that people paid attention when you had scientific information and you had hard facts,” said Whitaker.