My favorite was the Ecology Song. Or was it Mercy, Mercy, Me?
ETA: And people did listen for a while, and passed legislation to help with clean air and water with good results.
Unfortunately, people have either forgotten, or never knew about rivers catching fire, air quality alerts, and generally how dirty many of our cities were, and how important it is to keep the regulations to maintain our cleaner, healthier, environment. Even now it's unacceptable that we keep hearing about lead contaminated water in places-and yet it could get even worse.