Pollution melts bikes, I'm sure of it.
This does look a litle like strange organ pipes, doesn't it? However, what it is doing is measuring London's lungs - the pollution on our streets. These instruments are just by the side of Marylebone Road. Amusingly, Marylebone Road was the first bypass ever built int he 17th Century so that the steenkin' animals didn't have to go through town.
Here is the output from the site.