During the early stages of the North Atlantic Treaty Organization (NATO)'s 1999 bombing of Yugoslavia, Blažić argued that the American-led coalition was targeting chemical industry facilities "in an obvious attempt to cause an environmental disaster." He later accused NATO of using chemical and radioactive weapons against Yugoslavia in breach of international conventions, adding that what he described as NATO's "carpet bombing" of Kosovo and Metohija raised the question of whether the military alliance actually wanted Albanian refugees to return to the area as it claimed. At one press conference, Blažić accused NATO of violating international conventions pertaining to oil pollution, benzol poisoning, prevention of risk of cancer, cross-border air pollution, ozone layer protection, protection of the flora and fauna, and protection of workers from occupational hazards. Following the conclusion of the bombing campaign, he suggested that the smoke and toxic fumes caused by NATO's actions might have contributed to the heavy rainstorms and other bad weather affecting Serbia in the summer of 1999.