Journalists look at a test run of Japane [Getty Images]

YOKOHAMA, JAPAN: Journalists look at a test run of Japanese automaker Mazda's RX-8 equipped with a hydrogen rotary engine which is capable of running both on hydrogen and gasoline, at its research and development center in Yokohama, suburban Tokyo, 07 October 2004. The concept car is able to cruise about 70 kms with a 74-liter tank of hydrogen compressed at 35 megapascal. The company will exhibit the car at the 2004 Tokyo Motor Show in November and has a plan to put the hydrogen engine vehicle on the market within two years. AFP PHOTO/Toru YAMANAKA (Photo credit should read TORU YAMANAKA/AFP via Getty Images)

AFP TORU YAMANAKA