Billboards don’t add much to the urban environment besides visual pollution and a sense of clutter. Maybe that’s just because we’re not utilizing them correctly. If billboards could feature aerial bamboo gardens and Wi-Fi connected climate monitoring systems instead of advertisements, they’d be a lot more palatable. That’s what Los Angeles sculptor Stephen Glassman wants to do. His vision: installing planters, bamboo, and sensors that keep track of air quality and temperature into Los Angeles billboard spaces.