At first light the Trinity Trails fill with cyclists and runners following the West Fork past cottonwoods, the river sliding slow and brown beneath the bridges. Fort Worth has worked hard to turn its riverbanks into parks and trails, and The Greener Good puts that same instinct to work on the city's front yards as a lawn care business. September is when the effort shows: the worst of summer finally spent, mornings softer, grass ready to thicken again before the cooler months. A lawn revived after August is a small public kindness, the bright square of green that a passerby notices without quite knowing why. Greener is good, as the name has it, and in Fort Worth that good grows outward from every cared-for yard.