The world is slowly, but inevitably, moving away from petrol and diesel as the motive power source for cars and trucks. Some vehicle manufacturers are adopting hybrid drivetrains as a stopgap, but even longtime fossil fuel burners like Volkswagen are investing in clean tech like battery energy storage. As well as being a leader in hybrid tech, Toyota is throwing its considerable weight behind hydrogen fuel cells -- and the first three cars using the tech have just been delivered to Australian shores.