4 vtg 1972 ecology Noise Annoys Pollution hippie humor 13"-14" decal sticker Lot For Sale

Original, Vintage1972 US issued comical ecology bumper sticker lot ofFour assorted , all unused.a)Noise - Shhhhhhh
b)Noise - Annoys
c)Protect our environment
d) smallest decal pictured at bottom, with clear background , titled "Clean Air"THREE stickers Measures: 13 1/4" to 14 3/4" inches in length.these are vinyl vintage stickers. the adhesive backing is attached , but being 45 years old , the adhesive may have lost some of its original strength.o/w Unused, nice condition for age.these were some type of promotional stickers issued by the U.S. Environmental Protection Agency ( EPA ) about 1972 , as that is the date on the blue stickers.