Officials of the Department of Environment and Natural Resources (DENR) now have two theories on how cyanide found its way to the Bay: it might have been accidentally dumped into the Bay from a cargo ship or that Industrial companies have intentionally dumped cyanide into the Bay through the sewers.

a. There are two theories on how cyanidegot Into the Bay
b. There are two ways of dumping cyanide into the Bay
c. There is cyanide in cargo ships in industrial companies​