Now, the big question. In light of recent reports about plastics leaching into warm water, and given that black plastic balls will inevitably get hot in the summer sun, has Los Angeles just traded one carcinogen for another?
Web Research Update: The article says they're using airport "bird balls". If they're the same as those made by this manufacturer, they're made of high-density poly-ethylene (HDPE). And, good news! According to this page from the Sierra Club, HDPE is not know to leach harmful chemicals. Well. Apparently, the LA DPW knows what they're doing. Very good. Please continue with your Public Works.