According to ecotoxicologist from Far Eastern Federal University (FEFU), from the 90s and during 2000s in the tissues of Russian Far Eastern mussels the concentration of organochlorine pesticides (OCPs) that had been globally used in agriculture in the mid-twentieth century has increased about ten times. OCPs pollute and affect badly the ecosystems of the Sea of Japan, the Sea of Okhotsk, and the Bering Sea. A related review was published in Water Research.
Source: EurekaAlert, https://www.eurekalert.org