Two eye opening documentaries here, the first one about the emerging crisis of plastic pollution in the worlds oceans, and the effects it has on wildlife and the world.
Drowning in Plastic
The second one is about the history of landfill, and discovers what is happening to the things we have thrown away over the last one hundred and thirty years.
The Secret Life of Landfill: A Rubbish History
I suspect you can only watch these if you're in the UK, sorry.