PaperKarma - "Kill junk mail, save trees" is the slogan of this free app that helps you eliminate the junk mail in your life. Just photograph the junk mail you want to eliminate and PaperKarma automatically contacts the sender on your behalf. Available for Apple devices, Android and Windows Mobile; www.PaperKarma.com
Rather than photographic, this illustration shows a hand reaching to pick something small whilst forming a water droplet. A very clear exemplary method of illustrating a strong point for ''saving water''