Cooking oil must be refined so it is safe for human consumption, if that oil contaminates water supplies or sources, this could harm fish, birds, and wildlife. Oil causes birds to become stuck & unable to fly away from predators. Some slowly starve to death in a most inhumane manner. It is best to call professionals before pursuing cooking oil cleanup for Chicago spill events. Learn more about the service provider of cooking oil cleanup in Chicago at CABENO Environmental Field Services, LLC. For more information, visit their website at https://cabenoenvironmental.com/emergency-fuel-and-oil-spill-cleanup-services/ or call them today.