Which is Greener: Urban Farms or Urban Density?

Edward Glaeser adds "large-scale metropolitan farming" to a list -- which also includes historic preservation -- of barriers to densifying urban development patterns. His argument is that the latter is the greener of the two.

"All that is grassy is not green," begins Glaeser, in his most recent attack on planning efforts to implement large-scale metropolitan farming, which he believes "will do more harm than good to the environment."

Here's why:

"While neighborhoods benefit from the occasional communal garden, it is a mistake to think that metropolitan areas could or should try to significantly satisfy their own food needs. Good environmentalism is smart environmentalism that thinks through the total systemic impacts of any change. Farm land within a metropolitan area decreases density levels and pushes us apart, and carbon emissions rise dramatically as density falls."

Additionally, he cites a study which found that growing certain crops or livestock less suited for a given climate significantly increases the amount of greenhouse gas emissions and fertilizer required for growing, to the point where it is actually more environmentally friendly to grow where it is most suitable and then have the products shipped over long distances to consumers.

Thanks to Scott Ulrich

Full Story: The locavore’s dilemma


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 $245
Planetizen Courses image ad

Planetizen Courses

Advance your career with subscription-based online courses tailored to the urban planning professional.
Starting at $16.95 a month

City Coasters

Hand-drawn engraved maps of your favorite neighborhoods are divided up across 4 coasters making each one unique.
Women's t-shirt with map of Los Angeles

City T-Shirts for the ladies!

Women's Supersoft CityFabric© Fashion Fit Tees. Now available in six different cities.