Then, in 1953, at Japan's Minimata Bay, there erupted a very serious incident of mercury poisoning: A factory near the bay, in the process of making acetaldehyde had used mercuric oxide as a catalyst and then proceeded to dump it straight into the bay.
一九五三年，日本水俁海灣（Minimata Bay）爆發了嚴重的汞中毒事件。