The designers came up with a elevated racking system to hold vegetation over the typical sad looking air exhaust vents.I think that not only could you put eye catching plants there, you could also make it into a mini community garden too!
Cool idea. Could even baffle the noise a bit.
That would be a nice bonus with the noise reduction.
Soon we won't be able to see the sky for all the grass everywhere.
Is that available on Etsy @adam?