Eh. From that perspective (art is an expression that causes emotion) pretty much anything around us is art, it's just not good art or great art.
To me, good art must show some effort, originality, talent or skill AND be able to create an emotional response (the stronger, the better). It's not the same to look at a doodle than it is to look at the Mona Lisa. Doodles are easy to do, are abundant, require no skill and don't really create any emotion (unless it's the first doodle drawn by your son or daughter or something like that, then it's artistic to YOU).
Art doesn't have to be good to be art. However, no one goes to a museum or a gallery to look at bad art or at mundane things thrown together in a jiffy.
I remember me visiting a museum in Minessotta. It had this car wreck in the middle of a room painted in blue. I looked at it from afar and thought "And they call that art?" I thought the artist had just taken a car wreck from a junkyard and painted it blue. Then I got closer and read the little description all paintings and sculptures have, that gave a little explanationj on the piece: He did get a car wreck from a junkyard, then he dissassembled it entirely, made every single piece out of fiberglass, then assembled the fiberglass pieces. The whole thing took him two years.
I looked at it again and my God! What a work of art! It looked exactly like a car wreck! Great stuff!
Art is like beauty. It's in the eye of the beholder.