Whale oil vs petroleum
Whale oil is oil obtained from the blubber of whales. Whale oil from the bowhead whale was With the commercial development of the petroleum industry and vegetable oils, the use of whale oils declined considerably from its peak in the 19th 21 Mar 2015 This graphic shows imports of whale oil and the more highly prized sperm whale oil to the USA. Note that whale oil declines after 1840 and sperm oil a little after.