
Take a rubberband and loop one end over your index finger. Now pass the rubberband around the back of your hand. Loop the other end over your thumb. Now try to remove the rubberband without touching anything or using your other hand.
The plastic rings that come on 6 packs of beverages can get over the mouths of dolphins and some fish. When this happens it is usually impossible for them to get the rings off. Sadly, the animals almost always die.
Plastic bags are often mistaken for jellyfish, a favorite food of turtles. The turtles see the bags floating and eat them. Unfortunately, the turtles cannot digest the plastic. Worse yet, the bags often block the digestive tract and the animal dies.