German scientists created process to turn carbon dioxide from air into liquid hydrogen . Theory has been around since 1970s , but implementation too costly until now . Process requires ultra - high temperatures , industrial production a long way off . It could also be used to store electricity , from wind , solar power .
German company created process to turn carbon dioxide from air into liquid fuel . Theory has been around since 1970s , but implementation too costly until now . Process requires ultra-high temperatures , industrial production a long way off . Technique could also be used to store electricity captured from wind , solar power .