A Physicist's View of the City as Machine

Astrophysicist Adam Frank takes a bird's eye view of the beautiful and perilous ways in which cities - "the defining element of human civilization" - exhibit the laws of thermodynamics.

Frank, who wrote recently for NPR on the physics of cities visible at street-level, returns to the subject from a higher perspective. From a roof-level view, he explains how cities exhibit the Second Law of Thermodynamics, which states that, "Useful work creates unusable waste [or entropy], always and forever." 

What strikes Frank from the rooftop is not what he sees, but what he can hear. "There is a word that applies to the sound of cities which almost never gets applied to nature: 'Din.' The din of cities heard on the rooftop as a rising wall of noise is a testament to the true nature of cities as engines of organization and dynamos of disorder."

The dark side of this beauty, however, writes Frank, is that "the work we do to create and maintain cities means we are also raising the level of disorder, waste and pollution for the planet as a whole."

"We live at a moment when cities are poised to become the dominant mode of human habitation on the planet. But we don't yet know if such a mode can be made sustainable for more than a century or two. Coming to grips with that question can only mean coming to understand the physics of cities - the physics of thermodynamics and its ever-present second law."

 

Full Story: The City As Engine: Energy, Entropy And The Triumph Of Disorder

Comments

Prepare for the AICP Exam

Join the thousands of students who have utilized the Planetizen AICP* Exam Preparation Class to prepare for the American Planning Association's AICP* exam.
Starting at $199
Planetizen Courses image ad

Planetizen Courses

Advance your career with subscription-based online courses tailored to the urban planning professional.
Starting at $14.95 a month
City Plate table setting

New Arrival! City Plates

City downtown cores printed on gorgeous decorative collectible porcelain plates.
$50.00
Wood necklace with city map

City Necklaces

These sweet pendants are engraved on a cedar charm with a mini map of selected cities. The perfect gift for friends and family or yourself!
$28.00