[PW] PCB migration map

[BETZ-ZALL, JONATHAN]

Help! One of my faculty members is looking for an online interactive map
depicting the movement of PCBs (polychlorinated biphenyls--a serious
carcinogen). Here is what he remembers:
The website uses flash or something similar to track the movement of a
PCB molecule from its creation in the 1960s up through various levels
until it is found today in polar animals.  I literally remember a map of
N. America where you can track its movements.  Each spot then gives more
details. 

Many thanks for any help you can provide.

Cheerio!  Jonathan