Here’s a sign, that says it all:
photo with permission by Paulette – visit her PhotoStream at Flickr
Nothing but an reminder, to get active when you walk in nature and find trash, that people left. I have a bag with me where ever I go and made it a habit to pick up what I can get to. Shaking your head and complain loudly will not bring back those who dropped the trash and have them take it away. In the meantime animals can get hurt by bottles, cans, wires, plastic stuff and what ever people throw away.