A Picture is Worth... Albatross Carcass
This image shows the corpse of an albatross that has had his gut filled with different plastic objects. Many birds and animals often mistake plastics with food and then, as you might imagine, starve to death.
I've seen this picture being published on a numerous of websites. But I don't actually know who should be credited for it. It seems it comes from Algalita - the marine research foundation.