I'm reminded of a thread here a few years back in which somebody complained about telephone poles in an image not being perfectly vertical.
I was astonished, as here in the Boston area I would defy anyone to find a telephone pole that is close to vertical. 5 to 10 degrees out is common, with the wires to the next pole keeping the pole from falling.
Our trees are a bit better behaved, but they certainly respond to wind and light, so they are seldom straight up.