Need for Diversification in Powertrain Technology

As the production of oil is steadily heading towards its peak and will start to fall when this point has been reached, one vital question arises: What will be the future fuel for cars? It is most probable that petroleum will not be replaced by a single fuel but by several candidates. Fuel is likely to diversify and, as a consequence, there will also be a diversification in engine and powertrain technology. The automotive industry cannot focus on one technology alone.