To this end, cities like Philadelphia are working to increase their tree canopy. “Trees take the edge off the searing heat of summer. They soak up rainwater. And, recent academic studies have shown that greenery reduces crime and helps people battle depression.” (“More city trees can help with climate change,” Editorial, The Inquirer, Philly.com, October 3, 2018). Swarthmore offers its own street tree planting program, selling trees at a discounted price which includes planting and mulching. (Be sure to choose a location that avoids the tree growing up into overhead wires). See borough web page for information about ordering a tree.