Category Archives: Energy


In the class I’m teaching this semester, Cities and the Environment, we’ve been debating the merits of urbanization from a sustainability perspective. One thing that is becoming clear is that density matters — it helps to determine the efficiency of … Continue reading

Posted in Buildings, Energy, Planning, Water | 2 Comments

Entropy: It’s the Law

I am having some fun thinking about the physics of cities today, hence the cheesy post title. The NPR Cities Project has been trying to capture “the vibrancy of urban life today” and that includes producing a great set of … Continue reading

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Urban Metabolism is Faster than Ever

Cities have a metabolism — an in and out flow of materials and energy. The pace and scale of this metabolism help to determine how sustainable cities are. At least, this is a popular idea among academics. I spent last … Continue reading

Posted in Climate Change, Energy, Water | Leave a comment