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Air pollution makes surprisingly good art supplies
Plumes of diesel exhaust contain a mixture of things both nasty and harmless. A lot of it, however, is carbon. Carbon can be useful and (as you might recall from school) is often jet black in color. Start-up Graviky has created an exhaust filter that can pull 95% of the carbon soot from diesel exhausts, and then transform this into useable, purified, black ink or paint. The result is what co-founder Anirudh Sharma calls Air-Ink, and it's already being used in markers and oil-based paints. The process is far more sustainable than typical methods for making black carbon ink, which requires directly burning fossil fuels. The project is turning something we don't want, air pollution, into something we do: art. Oh, and billboard ads.
