Can littering be deadly? Please confirm by using existing data.?

My name is Deborah and I am a student at the Manukau Institute of Technology. It is part of our research assignment to find out what it is really in our bins and how littering can harm everyone or majorly pollute the atmosphere. If you have answers please tell me as soon as possible. Thank you!

"You can get anything you want at Alice's Restaurant
You can get anything you want at Alice's Restaurant
Walk right in it's around the back
Just a half a mile from the railroad track
You can get anything you want at Alice's Restaurant"

-Arlo Guthrie

Okay, not DEADLY, but if you get faced with "twenty seven eight-by-ten colour glossy pictures with circles and arrows and a paragraph on the back of each one" and you too might end up wanting to "I said, "Shrink, I want to kill.  I mean, I wanna, I wanna kill.  Kill.  I wanna, I wanna see, I wanna see blood and gore and guts and veins in my teeth.  Eat dead burnt bodies. I mean kill, Kill, KILL, KILL."  And I started jumpin up and down yelling, "KILL, KILL," and he started jumpin up and down with me and we was both jumping up and down yelling, "KILL, KILL."

So, I guess it COULD be deadly.