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What harm does your nitrogen footprint do?

Researchers from the University of Sydney have calculated the average nitrogen footprint of people from 188 countries. They hope their work will pave the way to policies that could help the world reduce its emissions of reactive nitrogen. One of those involved with the research is Arunima Malik.
(Photo: Emissions of a harmful form of nitrogen contribute to deaths from air pollution. Credit: Getty Images)

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3 minutes