Seven trash cans as an illustration of seven types of waste. Image © Thomas Söllner on Fotoalia, with permission, slightly edited to add a seventh trash can to the original six on the image (desaturated yellow to get a grey can).
Many but not all of the images on this blog are under a Creative Commons License. If and only if the image above is under a Creative Commons license, you can find details for the different licenses at the Creative Commons. The most common licenses are Attribution CC-BY 2.0; 2.5; 3.0; and 4.0; and Attribution Share Alike CC-BY-SA 2.0; 2.5; 3.0; and 4.0;