The first international race powered by fuel cell vehicles took place in Rotterdam last weekend, it has been reported.New Scientist has stated that the Formula Zero event, which was staged in Rotterdam, is looking to become the zero-emissions equivalent of Formula 1.Energy is stored inside the vehicles using supercapacitors, which discharge power more quickly than batteries and help the karts move faster, car insurance customers may be interested to know.Godert van Hardenbroek founded the competition with Eelco Rietveld and stated that motor racing and environmental-awareness can go hand-in-hand."In the sustainable future that we want to live in, you can still drive around in circles just because you want to," he said.This comes as This Is Money has stated that motorists can save on fuel costs by converting their vehicles to run on liquefied petroleum gas, adding that it will take a year to recoup the £1,600 conversion cost.