Factory farming further reduces diminishing fish populations, according to researchers from the University of British Columbia. Their report found that more than a third of fish caught worldwide—36 percent—is used to feed farm animals such as chickens, pigs, and other fish. This unnatural diet threatens global fish stocks and contributes to climate change. Global fisheries use more fuel each year than 22 million cars just to catch fish and bring it to shore. The report, published in Ornyx: The International Journal of Conservation, also stated that consumer campaigns raising awareness about sustainable seafood do not effectively promote conservation.