A bus carrying as few as seven passengers is already more fuel-efficient and creates less pollution than an average single-occupant car used for commuting. But this new development could push these benefits to a whole new level. Students at University of Technology in the Netherlands have created world’s first bus that runs on formic acid — and say it could be the world’s next environmentally friendly fuel. It is much cheaper than hydrogen-based fuels but delivers the same environmental benefits — exhaust gasses consist of only water and carbon dioxide, without any other harmful gasses usually present in “standard” fossil fuels. Furthermore, the amount of carbon dioxide released this way is on a par with that taken from the atmosphere to produce the fuel, so there’s no net increase in those emissions.via