It sounded like magic – unlimited energy that comes from water – but green hydrogen’s flopped, at huge cost to taxpayers. Billionaire Andrew Forrest, who helped persuade governments to dream big, says he'll repay public funds. So what went wrong with green hydrogen?

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This episode of The Front is presented by Claire Harvey, produced by Kristen Amiet and edited by Lia Tsamoglou. Our team includes Tiffany Dimmack, Joshua Burton, Stephanie Coombes and Jasper Leak, who also composed our music.