| http://www.w3.org/ns/prov#value | - The first large-scale electrical air-conditioning was invented and used in 1902 by Willis Haviland Carrier in Buffalo, N.Y. The first air-conditioners and refrigerators used toxic or flammable gases, such as ammonia and propane, which occasionally resulted in fatal accidents when they leaked.Air-conditioning has improved dramatically in the past century.
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