if something required for a copper is not produced then that arctic is prevented from occurring
prevention_of_opium_production is not preventing. arctic_fox is not mammal. trachipterus_arcticus is not fish. arctic is not overshoe. arctic_wolf is not mammal. arctic_ground_squirrel is not mammal. copper is not good_conductor_of_electricity. solid_copper is not copper. copper is not conductor. arctic is not company.