From 2002 to 2009 the PCB concentration in whale meat has fallen by 75%, DDT values in the same time period have fallen by 70% and mercury levels have also fallen.
在 2002 至 2009 年期間，鯨肉中多氯聯苯的含量已經下降了75%、滴滴涕含量下降了70%而水銀含量也有下降。