An Uk based organization named Hubbub plans to clean up the streets of London through its #neatstreets campaign. Their campaign is very very clever and genius project i have ever seen.
As you can see on the photos below the smokers vote on various topics by placing their cigarette butts into clear divided containers in public areas; another uses devices that play music when a cigarette butt is inserted; and also another encourages gum-chewers to connect the dots on specially designed boards. They said that on october they have an objective to tackle with littering on Villiers Street, Westminster, using the latest thinking on behaviour change and awareness raising from around the world.
Vote with your butt
Image credits: Charlie Elliott
Image credits: Sarah E Clarke
Stick your gum on to reveal the image
Image credits: Design Week
Image credits: Catherina Jones
Image credits: Jeannine Saba via hubbub.org.uk