I don't live in a large city, but I'd like us to do more to green the streetscapes and business landscapes.
Portland isn't perfect, but their street plantings, "hell strip" plantings (that's the strip between the street and sidewalk), and containers are a big improvement from what I normally see.
Of course Portland has the perfect benign climate for container plantings, and tough site plantings.
But, this is what I saw in the downtown Pearl District of Portland today, and think about what you could encourage in your community. I know I'll be going home with good ideas about what to try.