When trees from both sides of a street get big enough for their branches to meet in the middle, they have formed a tree canopy.

A tree canopy makes a big difference in the temperature of city streets. It blocks the summer sun from raising asphalt temperatures to sizzling levels. Streets cool quicker after dark because the pavement has less radiant heat to release.

Tree canopy provides a friendly environment for birds and squirrels. People appreciate a tree canopy, too, when checking the mail, walking to a neighbor’s house, or sitting in a hot car in traffic.