Anti-high-density development article in the LA Times
Added on Sunday, September 9th, 2007Today’s LA Times has a column by Ali Modarres, an urban geographer from the Pat Brown Institute of Cal State LA.
He argues that high density development will increase the urban heat-island effect, and is therefore worse for the environment.
This article outraged me because it’s a clear example of how science gets abused by policy makers. Or, in this case, policy-wonks. (This was the worst example I’ve seen since I read an article claiming that wind turbines would reduce the Sierra snowpack by reducing wind energy.)
The urban heat-island effect is real: As we pave over the natural landscape and replace it with asphalt, these surfaces retain and release heat from the sun. As a result, cities have higher temperatures than surrounding farmlands or parks.
The problem with this argument is that the urban heat-island effect sets in at fairly low levels of development. The alternative to LA’s high density movement is not a pastoral landscape or leafy suburbs: It’s Orange County, it’s Riverside, it’s the San Fernando Valley. These areas are already almost entirely developed, and the heat island effect is already extremely strong here.
The main point of the article seems to be that we need more open-space and energy efficiency to counter the heat-island effect. I have no argument with that (no, let me rephrase: I am in very strong agreement here). But I am very skeptical that you can meet either of these goals by opposing high-density development. The only alternative to high-density development is spawl. That or draconian population control.
To be fair, the author makes this point about the likely environmental benefits of high-density development in LA:
High-density development is usually considered environmentally friendly if it occurs near subway, rail or bus lines, and people can abandon their cars to get around. But unless people actually do take advantage of public transit and reduce their energy consumption, the environmental costs may outweigh the benefits.
He may be right about that. But under the sprawl-scenario, this isn’t even an option.



