This U.S. poster or label stamp promotes the Clean Air initiative, part of a wider public awareness campaign from the early 1970s emphasizing environmental protection. The design features a striking geometric sun motif in shades of ochre and red, symbolizing energy and vitality, with the slogan “It’s a Matter of Life & Breath®” printed boldly above. Such labels were distributed alongside stamps or postal materials to advocate for cleaner environments following the 1970 Clean Air Act. The right side bears a stylized cross-like emblem and design credit mark.