Premise: The production of anhydrous ammonia in the U.S. in 2000 was approximately 17,400,000 tons (equivalent anhydrous) with apparent consumption of 22,000,000 tons and about 4,600,000 met through net imports, as shown in a 2001 edition of U.S.

Hypothesis: The US does not produce any anhydrous ammonia each year.
Relation: contradiction