Well this is a little odd.
In Chicago, nearly every single tree on the street downtown has a price attached to it: The value it will return to the environment over the coming year.
Apparently for every $1.00 the City spends on tending the tree, it will return $2.70 in cleaner air, reduced need for air condition due to shade provided, and helping filter polluted water before it goes back into the City sewer system.
Makes you think! Should we be billing the equivalent for every tree that gets cut down?