In Praise of Air is a public poem with a scientific twist, installed on a University of Sheffield building using material designed to help break down pollutants. The point is partly visual, partly civic: a wall-sized poem asking passers-by to think about the air they share.
It is not a conventional monument, but it suits Sheffield, a city comfortable with industry, activism, and practical experiment. Seek it out if you are already around the university or interested in public art that does more than decorate a wall.