Trees, as you may very well know, can do amazing things for the environment. A single tree will sequester a ton of carbon dioxide in its lifetime. That's not all trees can do. Trees can be used to prevent erosion, reduce cooling costs, act as a windbreak and filter dirty water. If trees were an invention, they'd be the best one.
The aforementioned benefits may sway you to grow a few trees. Some people are handy enough to plant trees to maximize their benefits while keeping those trees from destroying the patio, interfering with power lines, dropping branches on the roof or impinging on the neighbor's property. If you don't think your thumb is green enough to handle all that, then you should call an arborist.