Asked by Meg
Sediment cores measured for containment levels have the highest levels of PCB's from the early 1960's. True or false
I think this is true? right? Help
Yes, it is true in most cases. An examp-le is shown at
http://pubs.usgs.gov/circ/circ1171/html/cores.htm
The reason is that PCB bans and restrictions on disposal began to take effect in the late 1960's.
I think this is true? right? Help
Yes, it is true in most cases. An examp-le is shown at
http://pubs.usgs.gov/circ/circ1171/html/cores.htm
The reason is that PCB bans and restrictions on disposal began to take effect in the late 1960's.
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