Editing Blubber (section)

===Toxicity===
In the 21st century, blubber contains man-made [[polychlorinated biphenyl]] (PCBs), carcinogens that damage human nervous, immune, and reproductive systems.<ref>{{cite journal |doi=10.1126/science.1106882 |title=Two Abundant Bioaccumulated Halogenated Compounds Are Natural Products |year=2005 |last1=Teuten |first1=E. L. |journal=Science |volume=307 |issue=5711 |pages=917–20 |pmid=15705850 |last2=Xu |first2=L |last3=Reddy |first3=CM|bibcode=2005Sci...307..917T |s2cid=9377016 }}
* {{cite press release |date=18 February 2005 |title=Chemical Compounds Found In Whale Blubber Are From Natural Sources, Not Industrial Contamination |website=ScienceDaily |url=https://www.sciencedaily.com/releases/2005/02/050213132247.htm}}</ref><ref>{{cite web | url=http://news.bbc.co.uk/2/hi/science/nature/1132889.stm | title=Japan warned on 'contaminated' blubber | work=BBC News | date=2001-01-24 | access-date=2009-12-31 | url-status=live | archive-url=https://web.archive.org/web/20090223093530/http://news.bbc.co.uk/2/hi/science/nature/1132889.stm | archive-date=23 February 2009}}</ref> The source of PCB concentrations is unknown. Since toothed whales are high on the [[food chain]], they likely consume large amounts of industrial pollutants ([[biomagnification|bioaccumulation]]); even [[baleen whale]]s, by merit of the huge amount of food they consume, are bound to have toxic chemicals stored in their bodies. Additionally, there are high levels of [[Mercury (element)|mercury]] in the blubber of seals of the [[Northern Canada|Canadian arctic]].<ref>{{cite journal|last1=Braune|first1=B|title=Persistent organic pollutants and mercury in marine biota of the Canadian Arctic: An overview of spatial and temporal trends|journal=Science of the Total Environment|date=16 August 2005|volume=351–352|pages=32|url=http://web4.uwindsor.ca/users/f/fisk/main.nsf/0/48abbaa50ed52cc08525724a006839ac/$FILE/STOTEN%202005%20Braune%20spatial%20temporal%20cont%20Arctic.pdf|bibcode=2005ScTEn.351....4B|doi=10.1016/j.scitotenv.2004.10.034|pmid=16109439|access-date=26 February 2018|archive-date=10 August 2017|archive-url=https://web.archive.org/web/20170810004605/http://web4.uwindsor.ca/users/f/fisk/main.nsf/0/48abbaa50ed52cc08525724a006839ac/%24FILE/STOTEN%202005%20Braune%20spatial%20temporal%20cont%20Arctic.pdf|url-status=dead}}</ref>