Linked from
The 63 pages that link to Petroleum refining, each with the reason it gives.
John D. RockefellerNarrower topic: Refining was the business at the center of Rockefeller’s rise.
PropyleneNarrower topic: Refineries remain a major source of propylene through catalytic cracking.
KeroseneNarrower topic: Kerosene is separated and further treated during petroleum refining.
BitumenNarrower topic: Refinery processes produce many grades of paving bitumen.
MaomingNarrower topic: Refining is a defining part of Maoming’s industrial economy.