These steps, however, might be significantly different in different regions. Without a successful green technology transition, GHG emissions may increase substantially in the next decades. An obvious way to decrease the transport carbon footprint is to increase the price of energy through taxation, thereby encouraging road users to adopt more energy-efficient driving behaviour and/or to consider other transport modes. However, high fuel taxation can have important implications on mobility, if not complemented by measures promoting viable alternative transport options such as adequate public transport.