For what it’s worth, I’d dial down the scorn and take this as an opportunity. Here’s the thing: my guess is that virtually nobody in the country thinks that cities are greener places than towns or suburbs. And by "virtually nobody," I mean maybe a few percent tops. For most people, it’s wildly counterintuitive on all sorts of levels to think of big, dirty, crowded, urban areas as "green." It just doesn’t compute.
Many years ago I gave a talk entitled, Green Manhattan, where I made the case that Metropolis was the greenest place in America.
Naturally, I got a lot of funny looks but the line that seemed to win a few converts was this: the best way to protect the environment is by keeping people out of it.
I admit I took a few liberties in the talk, not discussing how agriculture would be performed and supported, for example. Nonetheless, I think this framing breaks the intuition that green is about living with nature rather than letting nature live on its on.