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  2. Rome Fiumicino Airport - Wikipedia

    en.wikipedia.org/wiki/Rome_Fiumicino_Airport

    Leonardo da Vinci Rome Fiumicino Airport (Italian: Aeroporto Leonardo da Vinci di Roma–Fiumicino) (IATA: FCO, ICAO: LIRF) is an international airport in Fiumicino, Italy, serving Rome. It is the busiest airport in the country , the 8th-busiest airport in Europe and the world's 28th-busiest airport with over 49.2 million passengers served in ...

  3. Calcium bicarbonate - Wikipedia

    en.wikipedia.org/wiki/Calcium_bicarbonate

    Calcium bicarbonate, also called calcium hydrogencarbonate, has the chemical formula Ca(HCO 3) 2.The term does not refer to a known solid compound; it exists only in aqueous solution containing calcium (Ca 2+), bicarbonate (HCO −