As I’ve mentioned before, saving the environment, stopping pollution and other ecology-minded issues really caught steam and gained attention in the 1970s. The public service announcement below was typical of the era. The “Pitch In” campaign was sponsored by the US Brewers Association (see, the beer can folks really do care!) and I well remember these types of TV spots and the iconic “Pitch In” signs seemingly everywhere you looked.
The person who posted this spot on Youtube says its from 1975 but I believe it was produced earlier, likely in 1971. My guess is based on the clothing and cars seen in the spot as well as a Wikipedia listing for the author of the “Pitch In” jingle, Steve Karmen, where the tune’s creation date is 1971.
When you’re done watching the PSA do remember to crumple it into a ball and toss it in the trash, mmkay?