There is also a correlation between trees and wealth in urban neighborhoods. Not sure where I read it, but it definitely applies to Philly.

The more trees that exist in the neighborhood (think Society Hill, Rittenhouse Square, Wash West, Queen Village, Mt Airy, Chestnut Hill), the wealthier on average, the neighborhood.

Philadelphians have an odd relationship with trees. This is the only place that I've ever heard people call trees "dirty" (South Philly). Odd.

Even on my parent's block in the burbs, I feel like there is a correlation between the green-ness of the yards the background of the folks. The families with ties to South Philly have no trees in their yards and only the token bush here or there. Everyone else has pretty lush yards.

If your first inclination when you move to the burbs is to take down all of the trees on your property, you probably shouldn't be living in the burbs.

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NUTTER 2007