I’ve seen coverage of this lately (the stories first appeared in August 2016), but didn’t realize it could be obtained on Kickstarter for as little as $25.

AIR-INK: The world’s first ink made out of air pollution

While at the MIT Media Lab, we asked ourselves a simple question. How can we turn something as ugly as air pollution into something as useful as ink?

That’s how we came up with AIR-INK. 

Through this Kickstarter, we are offering AIR-INK for the first time––as safe, refillable, high-quality, water resistant markers and screen printing ink. By using 30ml of AIR-INK, you can negate 45 minutes worth of pollution.

https://www.kickstarter.com/projects/1295587226/air-ink-the-worlds-first-ink-made-out-of-air-pollu