How quick can the acceptance of the population be achieved?

It will take the automotive industry 30 years to fully change over from technology to another. The government of Iceland expects that the economy of the country will be fully on hydrogen technology by 2050. It is obvious that within the 15 years of our scope the transition will only be in the very early stage or still in the experimental period. However it is the automotive industry that has to choose the technology and is the most poeweful in this choice. The infrastructure can be build very easily.