The Philadelphia Low Impact Development Symposium kicked off yesterday with a keynote presentation by Philadelphia Water Department Commissioner Howard Neukrug; the speech focused on Philly's green infrastructure, its relationship to recent flooding conditions, and PWD's focus on helping low-income customers manage stormwater. Low Impact Development (LID) is a planning and engineering design approach to managing runoff with small-scale, natural solutions such as green roofs and porous paving.

And not to be Bragadelphia about things (especially in light of the preceding post's shower of praise from Time magazine), but throughout presentations and workshops at the LID Symposium—which features speakers and attendees from around the world—Philadelphia was commonly the point of comparison for other cities' green infrastructure endeavors.