Trees make our lives better in unquantifiable ways | David Ferguson

One company is trying to measure exactly how much urban trees are worth. But some things defy calculation

There are a few colors that I adore. I love the first dark flashes of Baltic blue-black on the horizon when I'm driving toward the Gulf of Mexico. I love the glaring green of a "go" traffic light against a bruise-colored, stormy summer sky.

More than anything, though, I love the bright yellow-green spatters of the first pecan leaves every spring. Like globs of paint flung straight from Monet's palette, they are to me the surest sign that winter has left the building and that long days and hot weather are on the way.