Air Pollution Ink
As long as we keep burning fossil fuels, we'll have to deal with air pollution. Air Pollution Ink uses it to create something worthwhile. By capturing pollution at the source — a car's exhaust pipe — students at the MIT Media Lab can turn it into carbon black ink. Every 45 minutes of driving renders 1 ml of liquid ink, which is then used to fill the 2mm, 15mm, 30mm, and 50mm markers, as well as the 150ml containers of screen printing ink.