In 1973, Deutsche Bundespost issued this striking four-value set to promote environmental awareness, a theme of global importance. Each stamp highlights a different aspect of conservation with modern symbolic artwork:

• 25 Pfennig – Waste (Abfall): Represents the need for recycling and reducing industrial waste, with a transition from pollution to flowers.

• 30 Pfennig – Water (Wasser): Illustrates clean water and marine life contrasted against pollution and industrial discharge.

• 40 Pfennig – Noise (Lärm): Symbolizes the fight against noise pollution, showing sound waves directed toward the human ear.

• 70 Pfennig – Air (Luft): Depicts industrial smokestacks alongside clean air and flying birds, stressing the importance of pure air.

Designed in a bold modernist style, the set embodies early 1970s ecological movements. Today, it stands as an essential piece for collectors of thematic issues on environment, conservation, and social awareness.