Sources

http://en.wikipedia.org/wiki/Impact_of_nanotechnology

http://en.wikipedia.org/wiki/Environmental_impact_of_nanotechnology

http://www.ncbi.nlm.nih.gov/pubmed/22738389

http://en.wikipedia.org/wiki/Nanofiltration

http://en.wikipedia.org/wiki/Magnetic_nanoparticles

http://www.zeitgeistaustralia.org/an-introduction-to-nano-technology/

http://www.cns.cornell.edu/news.html

http://crnano.typepad.com/crnblog/2004/05/what_is_nanotec.html