27. Chewing Gum
Many people don’t realize that modern chewing gum is made from synthetic polymers—essentially, a type of plastic.
Discarded gum is often found stuck to rocks along the shore or even floating in the ocean, blending in as invisible pollution.
This small but persistent pollutant highlights how everyday habits add to the plastic crisis.
To learn more about the hidden plastic in chewing gum, read this Scientific American article.