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<div class=Section1>
<p class=MsoNormal style='background:white'><cite><span style='font-family:
"Helvetica","sans-serif";color:#666666'>Science </span></cite><span
class=apple-converted-space><span style='font-family:"Helvetica","sans-serif";
color:#666666'> </span></span><span style='font-family:"Helvetica","sans-serif";
color:#666666'>17 Jun 2016:<br>
Vol. 352, Issue 6292, pp. 1388-1389<br>
DOI: 10.1126/science.aaf9075<o:p></o:p></span></p>
<p class=MsoNormal style='line-height:18.0pt;background:white'><span
class=overlinesubject><span lang=FR style='font-family:"Helvetica","sans-serif";
color:#666666;text-transform:uppercase'><o:p> </o:p></span></span></p>
<p class=MsoNormal style='line-height:18.0pt;background:white'><span
class=overlinesubject><span lang=FR style='font-family:"Helvetica","sans-serif";
text-transform:uppercase'>MARINE ENVIRONMENT</span></span><b><span lang=FR
style='font-family:"Helvetica","sans-serif";text-transform:uppercase'><o:p></o:p></span></b></p>
<h1 style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:11.25pt;
margin-left:0in;background:white;box-sizing: inherit;font-size:2.25rem'><span
lang=FR style='font-family:"Helvetica","sans-serif";color:#333333;font-weight:
normal'>Persistent pollutants, persistent threats<o:p></o:p></span></h1>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
margin-left:0in;text-indent:-.25in;line-height:18.0pt;mso-list:l2 level1 lfo2;
background:white'><![if !supportLists]><span style='font-family:"Helvetica","sans-serif";
color:#666666'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span class=name><span style='font-family:"Helvetica","sans-serif";
color:#666666'>Paul D. Jepson</span></span><span style='font-family:"Helvetica","sans-serif";
color:#666666'><a
href="http://science.sciencemag.org/content/352/6292/1388?utm_campaign=toc_sci-mag_2016-06-16&et_rid=34815706&et_cid=564598#aff-1"
id=xref-aff-1-1><span style='font-size:9.0pt;color:#37588A;border:none windowtext 1.0pt;
padding:0in'>1</span></a>,<span class=apple-converted-space> </span><span
class=name>Robin J. Law</span><a
href="http://science.sciencemag.org/content/352/6292/1388?utm_campaign=toc_sci-mag_2016-06-16&et_rid=34815706&et_cid=564598#aff-1"
id=xref-aff-1-2><span style='font-size:9.0pt;color:#37588A;border:none windowtext 1.0pt;
padding:0in'>1</span></a></span><span class=xref-sep><span style='font-size:
9.0pt;font-family:"Helvetica","sans-serif";color:#666666'>,</span></span><span
style='font-family:"Helvetica","sans-serif";color:#666666'><a
href="http://science.sciencemag.org/content/352/6292/1388?utm_campaign=toc_sci-mag_2016-06-16&et_rid=34815706&et_cid=564598#aff-2"
id=xref-aff-2-1><span style='font-size:9.0pt;color:#37588A;border:none windowtext 1.0pt;
padding:0in'>2</span></a>. Email:<span class=apple-converted-space> </span><span
class=em-addr><a href="mailto:paul.jepson@ioz.ac.uk"><span style='color:#37588A;
border:none windowtext 1.0pt;padding:0in'>paul.jepson@ioz.ac.uk</span></a></span><o:p></o:p></span></p>
<h2 style='background:white'><span style='font-family:"Helvetica","sans-serif";
color:#333333'>Summary<o:p></o:p></span></h2>
<p style='mso-margin-top-alt:11.25pt;margin-right:0in;margin-bottom:0in;
margin-left:0in;margin-bottom:.0001pt;line-height:18.0pt;background:white;
box-sizing: inherit;transition: background-color 1s ease-in-out 1s' id=p-2><span
style='font-family:"Helvetica","sans-serif";color:#333333'>Persistent organic
pollutants (POPs) are chemical substances that persist in the environment,
accumulate in the food web, and pose a risk of adverse effects in humans and
wildlife (<em><span style='font-family:"Helvetica","sans-serif"'>1</span></em>).
Rachel Carson first identified the potentially devastating effect of POPs on
wildlife in the early 1960s (<em><span style='font-family:"Helvetica","sans-serif"'>2</span></em>).
In the late 1960s, polychlorinated biphenyls (PCBs) were detected in high
concentrations in wildlife in Sweden (<em><span style='font-family:"Helvetica","sans-serif"'>3</span></em>).
After PCB use and manufacture were banned in 1979 (US), 1981 (UK), and 1987
(EU), levels started to decline slowly in all biota around the world (<em><span
style='font-family:"Helvetica","sans-serif"'>4</span></em>–<em><span
style='font-family:"Helvetica","sans-serif"'>6</span></em>). In 2004, the
Stockholm Convention committed more than 90 signatory countries to phasing out
or eliminating large stocks or other sources of POPs, including PCBs (<em><span
style='font-family:"Helvetica","sans-serif"'>1</span></em>). Yet, PCBs continue
to threaten the survival of marine predators. Concerted efforts are thus still
needed to mitigate PCB pollution.<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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