I don't much about other cities, but here in Philadelphia lots of Tulip Poplars were planted during the very first wave of proto-environmentalism in the late 19

I don't much about other cities, but here in Philadelphia lots of Tulip Poplars were planted during the very first wave of proto-environmentalism in the late 19th century. They weren't an incredible environment boon unto themselves, but they are leading to secondary succession[1], which is to say, a more stable ecosystem closer to what we think of as "wild". If these new, rapidly-growing hybrids can lead to secondary succession more rapidly, they may provide a lot of indirect ecological value. [1] https://en.wikipedia.org/wiki/Secondary_succession https://en.wikipedia.org/wiki/Secondary_succession