Air conditioning
Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1902 by US inventor Willis Carrier. The introduction of residential air conditioning in the 1920s helped enable the great migration to the Sun Belt in the United States.
Elie Aghnides
Elie Prodromou Aghnides (1901–1988) was a Greek engineer and inventor, most famous for his invention of the faucet aerator. He was born in Istanbul, Turkey, in 1901. He had three siblings: Nicholas Prodromou Aghnides (1883-1979), a former professor at Columbia University; Thanassis Prodromou Aghnides (1889-1984), a former Greek ambassador and undersecretary to the United Nations in London during World War II; and Esmeralda Aghnides (1895-1992). Aghnides was educated in England and received an engineering degree from the University of Belgium.