Milton Glaser is one of the greatest graphic designers in the world, having created the seminal "I♥NY" logo back in 1977, New York Magazine, and an iconic 1966 poster of Bob Dylan. But his latest work may be his most important yet: a logo for climate change. The new logo, a simple but evocative gradient green and black orb obviously symbolizing Earth, is part of a new campaign by Glaser to create greater urgency about climate change solutions, according to Dezeen. The logo is being used on billboards around New York, and for $5 buttons that Glaser hopes will motivate governments and businesses to address climate change in a more meaningful way.