![](/sites/default/files/hm/Hedges.jpg)
Hedges are often more efficient than trees at soaking up pollution on city streets, research suggests, as they are located at the same level as car exhaust pipes.
http://www.bbc.com/news/science-environment-39943197
Hedges are often more efficient than trees at soaking up pollution on city streets, research suggests, as they are located at the same level as car exhaust pipes.