and is something people are worried about hydrogen is so light that immediately dissipates if you have a crash and if you have an accident with a gasoline powered vehicle the gasoline can leak onto the ground it remains flammable for some time afterwards about hydrogen is lighter than air so it disperses in the end i like what the hell. i managed to avoid crushing the car just as well given its price and rarity sibylla vapor hopes we'll be seeing more hydrogen powered cars in the future. to sadie's use it to launch the world's first plug in hard to be a groom later this year. as you often found out hydrogen fuel cells are the admitted water as a byproduct and don't need additional inputs so if a sustainable source generates the hydrogen the tech is truly green even greener than the hydrogens biggest competition in replacing petrol and diesel lithium ion