Inventor Anirudh Sharma is capturing carbon from car exhausts to turn it into ink. And he’s got his eye on London’s black cabs next

In 2014, the World Health Organisation dubbed air pollution the “single largest environment and human health threat”. With particulate matter and toxic pollutants accounting for 6.5 million deaths annually, many cities around the globe are gasping for solutions.

Engineer Anirudh Sharma has come up with a creative approach. While walking in Mumbai in 2013, the MIT Media Lab student and “chronic inventor” noticed that the plumes of diesel exhaust emitted by buses and cars were staining his clothing black.

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Source: Guardian Climate Change