Pollution

Pollution is an environmental problem caused by disposal of human byproducts into the land, air, and sea, resulting in health risks for both humans and animals.

Mainstream Smurfs Media
In the Smurfs cartoon show episode "The Incredible Shrinking Wizard", Gargamel's careless dumping of his failed formulas into his muck pond has created magical pollution which has seeped into the River Smurf and has caused mutations in the marine life, also making the water unsafe for Smurfs to drink. Gargamel becomes a victim of his own pollution when the mixed formulas he has ingested from the muck pond has caused him to shrink, and only doing good deeds could restore him to his normal size.