Smog is a public artwork by American artist Tony Smith located to the south east of McCardell Bicentennial Hall on the Middlebury College campus, in Middlebury, Vermont. An example of minimalist sculpture, the piece is a lattice of 45 octahedra, standing on 22 tetrahedra, and topped with 15 prisms. It is fabricated from aluminum, painted black. This work is first in an edition of three, with one artist's proof.