Over the past few months, trees have been replanted in the median strips up and down Van Ness street. I'm sorry there is no "before" picture to show the contrast, because they freshen the appearance considerably. Today we saw some trees in the Potrero area with Friends of the Urban Forest labels tying their trunks to stake supports.
Trees, according to fuf, 1) cut down on traffic noise, 2) trap dust particles on their leaf surfaces, 3) offer wind protection, and of course 4) remove carbon dioxide from the atmosphere. My friend and I noticed that without removing litter, the trees made certain streets appear cleaner.
Fuf will plant a tree in any public area where at least 30 trees are requested. Fuf also offers guidelines for planting your own tree, including permission applications to submit to the department of public works, and step-by-step instructions for cutting a hole in your cement sidewalk.