This story was updated at 6 p.m. PST
The City of Seattle is suing Monsanto for manufacturing a cancer-causing chemical that's contaminating the city's Duwamish Waterway.
Monsanto was the sole producer of the chemicals PCBs from the 1930s through the ‘70s. They were used globally to make coolants, paints, lubricants and for other industrial purposes. PCBs also served a fire protection and safety protection for the electrical and other industries, according to the company.