Daimler's 36 hydrogen fuel cell buses, including some that were used in the 2006 World Cup in Germany and since then used as public transportation vehicles in Berlin, have now driven more than two million kilometers (about 1.24m miles) in daily driving. 30 buses were in Europe and there were three each in Perth, Australia and Beijing, China. Daimler says that the buses are proof that its fuel cell tech (also available in cars, of course) has "proved its worth in different climatic regions." The buses - which have moved over seven million passengers during 135,000 operating hours since 2003 - operated throughout Europe, from Sweden to Spain. The European buses are known as HyFLEET:CUTE (Hydrogen Fleet Clean Urban Transport for Europe) and are all being monitored so Daimler knows how to make better hydrogen fuel cell systems in the future. More details after the jump.