Nitrous oxide is a potent greenhouse gas and ozone-layer depleting compound, and each year humans are responsible for releasing millions of tons of it into the air.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/double-duty-device-aims-generate-electricity-sunlight-while-reducing-nitrous-oxide-pollution
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/eco-business
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science-and-technology
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control