The findings add to increasing evidence of the health consequences of air pollution from petroleum extraction and refining.
Types of cancer risk
The review identified an increased risk of mesothelioma, skin melanoma, multiple myeloma, and cancers of the prostate and urinary bladder, and conversely, decreased risk of cancers of the oesophagus, stomach, colon, rectum, and pancreas.
Offshore petroleum work was associated with an increased risk of lung cancer and leukaemia.
Living close to petroleum facilities was also associated with an increased risk of childhood leukaemia.
Their findings have been published in the International Journal of Environmental Research and Public Health.
More research needed
The scientists argue that the best way forward may be an international consortium to guide new studies in Africa, the Middle East, and Asia, in order to harmonize how studies are carried out and how exposure is assessed.