From the data provided by Taiwan High Speed Rail Corporation, Taipei Rapid Transit Corporation and Industrial Technology Research Institute of Taiwan, the GHG emissions of different passenger vehicles are shown in the following diagram. In this diagram it is obvious to see the mass transportation is GHG emitting.

China Steel Corporation (CSC) has invested in Kaohsiung Rapid Transit System and put it in commercial in 2008. Nevertheless, CSC provides its employee free transit shuttle bas, paves bicycle path to the transit station and offers value card as prizes in activities to promote metro.