Sometimes, all that's needed to encourage people to recycle is a little incentive. That's why soda cans and beer bottles have deposits, and why Coca-Cola built an arcade machine that runs on empty plastic soda bottles instead of coins.
Sure, it's also a way to advertise sugar water, but that doesn't make this recent initiative any less wonderful. The Happiness Arcade was placed in six different locations in Dhaka, Bangladesh, over a week. And even though it only played a simple modified version of Pong, the machine still ended up collecting thousands of empty plastic bottles.