«New Bedford Harbor identified as major source of airborne PCBs: Harbor is largest reported continuous source of airborne PCBs from natural waters in North America.» (sciencedaily.com)
In fact, airborne PCB emissions from the harbor are so high that researchers say it is the single largest continuous source of airborne PCBs ever measured from natural waters in the U.S. and Canada. (sciencedaily.com)
It is the brightest continuous source of X-rays beyond the Solar System. (public.nrao.edu)