But MIT spin-off Graviky Labs is stock­piling soot emitted by diesel-­burning engines to recycle into black ink. “Pollution is bad, but pollution happens to be a really good raw material to ...

It collects carbon soot from a car's exhaust. Then it is processed into a high-quality black ink. #5 These edible water blobs are biodegradable. The capsule is made from a seaweed extract.

A device the company calls Kaalink then separates out the carbon as soot, leaving out other ... Kaalink to be mixed with oils and water to make paints, inks, and so on. Just 30-50 minutes of ...