Along the west edge of Niles the North Branch of the Chicago River slides quietly under the cottonwoods, and the backyards that lean toward it hold their color deep into August. BlueScape Landscaping mows, trims and edges those properties, and carries off the clippings and yard waste when a week's growth gets ahead of a weekend. Humidity rolls up off the water on August afternoons, the grass drinks it and climbs, and someone has to keep answering. The reward is a lawn lying flat and even in the low evening light, every border true. It is unhurried work, repeated week after week.