On February 16th, my class met at the Houtan Metro Station for an “algorithmic walk.” Before walking, Professor Perry gave us some examples of how to observe and think while walking by asking questions about a fence facing the Metro exit and surrounding a construction site. He asked us to look closely, and think about what we were seeing: a fence covered in plastic “grass.” What was its purpose? What would happen to it after the wall came down? What was it made of, and did we think it had any intended significance or meaning?

After gathering my thoughts, I set off on my walk and soon met a construction worker. I thought I’d ask him about the “grass.”
The worker smiled and pointed out two main purposes: One is that it is loose and soft, so it can reduce noises produced by the construction site. The other is that it can protect the wall from becoming dirty and prevent people from putting up advertisements on the wall.
Though my professor seemed to want to make some kind of point about the environment, plastics pollution, oil, global warming, and how we represent “nature” in unnatural ways, the worker didn’t have any thoughts about those kinds of things.





