Anirudh Sharma: Ink made out of air pollution

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Every year, more than four to five million people die due to exposure to outdoor air pollution

around the world. This petri dish that you are looking at

contains approximately 20 minutes' worth of pollution captured off a pyrolysis plant.

This is PM 2.5. These particles -- you can see it right now,

but when they're out there in the air, you won't see them. These are so tiny that our lungs --

our bodies cannot filter them, and they end up in our bodies -- give us asthma and lung cancer if not treated in the right time.

On a trip back to India, when I was a student in 2012, I took this picture.

This picture stuck in my head. On one side, you see this exhaust of a diesel generator,

the same generator which is a sign of human progress, which is a sign of rapid industrialization

and what we have become as a society in the last 100 years, generating energy.

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