So many Green Techs of GM in Frankfurt

GM公司宣佈它的E-flex版的Opel概念車將會在九月的Frankfurt展出。E-Flex設計是由電動馬達提供動力，由引擎發電或直接插電來提供電力。
GM has announced that it will reveal a new Opel concept car powered by its E-Flex propulsion system at September’s Frankfurt Auto Show. The E-Flex design features an electric motor that provides drive to the wheels, and runs on batteries charged by a secondary powerplant or even a household power outlet.

GM公司已經展示了E-Flex系統可以跟汽油引擎或氫燃料電池動力做搭配，現在又多了柴油引擎的選擇。而下一代的E-flex概念車是"GM's Hydrogen4"
GM has already displayed E-Flex vehicles mated with petrol and hydrogen fuel-cell powerplants, and is now set to reveal a version working in conjunction with an ultra-efficient diesel motor. Alongside the new E-Flex concept will be GM’s HydroGen4, the carmaker’s next-generation hydrogen fuel-cell vehicle.

圖中是Opel new Corsa 1.3L CDTI，GM宣稱它一公里僅僅排放119g的碳。另外還有新的渦輪增壓引擎和柴油引擎，可以使用E85生質酒精燃料及天然氣。最後，GM還會展出16款新環保的引擎及10款變速系統，可以增進油耗表現及減低CO2的排放，預計在2012年推出。
Also on display will be Opel’s new Corsa 1.3L CDTI (pictured), which GM claims will emit just 119g of carbon per kilometer. Other initiatives include a new range of turbocharged petrol and diesel engines, E85 Bio-ethanol motors and compressed natural gas powered vehicles. Finally, GM will unveil plans for 16 new engine families and 10 transmission groups, all designed at reducing CO2 and improving fuel-economy, for introduction by 2012.