‘American Landscape at the Tipping Point’

Sometimes you can see things better from the sky. Alex MacLean, an aerial photographer with an M.Arch., has taken the bird’s-eye view of the human–planet relationship for over 30 years. This 1994 photo, Guillotined B-52 Bombers at the ‘Bone Yard,’ Tucson, Arizona, is part of his American Landscape at the Tipping Point at the Robert Koch Gallery in San Francisco, an exhibition of the modern landscape. Through July 2. • kochgallery.com