Nanoparticles are being generated continuously by vegetation and sea spray in rural areas; volcanoes are also sporadic sources of huge numbers of nanoparticles. Large numbers of particles are also created by by vehicles and industries in urban areas.

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_{Image courtesy of McGimsey, Game [Public domain], via Wikimedia Commons.}

These nano features enable them to climb and stick to almost any surface.

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_{Image courtesy of Guitarsandcars76 (Own work) [CC0], via Wikimedia Commons.}

The Morpho butterfly is one of these and many other butterfly species use nano-scale light-interacting structures on their wing scales to produce colour.

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_{Image courtesy of Steven G. Johnson, Copyright © 2004 via Wikimedia Commons.}

Printable solar panels can be achieved using nano inks.

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_{Image courtesy of ChristofferRiemer (Own work) [CC-BY-3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons.}

Nano filters can be used for water purification to provide clean drinking water without the use of chemicals.

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_{Image courtesy of W.J.Pilsak at the German language Wikipedia [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons.}