So you always wanted to be a forest ranger, but can’t imagine life without take-out food and lattes? One way to live out your fantasy is to care for an urban forest. Though it sounds like an oxymoron, urban forestry is a serious science. Urban foresters plant, maintain and care for street and median trees, making sure they survive and thrive. City trees must cope with a daily onslaught of car exhaust and dog visits, sidewalk encroachments and the occasional parking mishap. Through it all, urban trees deliver substantial economic, environmental and aesthetic benefits.