Hydrogen - one of those words that prompts people in environment world to nod sagely before quickly steering the conversation onto safer territory. Because honestly, no-one really understands what it is, what it's for, or whether it's terrible or brilliant or somewhere in between.Which is unfortunate, because Boris 'World King' Johnson has just come over all hydrogen-y in his headline-grabbing 10 point plan for a 'Green Industrial Recovery'.Hmm, what to do? Listen to yer Babble, that's what! Because, fearless truth-seekers and public servants that we are, we've trawled wikipedia on your behalf to find out what the hell a Hydrogen is and where to buy one. Sustainababble is your friendly environment podcast, out weekly. Theme music by the legendary Dicky Moore – @dickymoo. Sustainababble logo by the splendid Arthur Stovell. Ecoguff read out by Arabella. Love the babble? Bung us a few pennies at www.patreon.com/sustainababble.MERCH: sustainababble.teemill.comAvailable on iTunes, Spotify, Acast & all those types of things, or at sustainababble.fish. Visit us at @thebabblewagon and at Facebook.com/sustainababble. Email us at [email protected].