5 April 2021 Hydrogen has the potential to help bring more than half of the world’s emissions down to zero, but to reach that potential it requires aggressive government support, a dramatically improved value chain – and it needs batteries to fail. That last point is one of the most striking findings in a new series of reports by Norwegian energy research house Rystad Energy, the last of which, on the “battery society”, was released last week. The reports examine three solutions to the problem of storage in an energy system dominated by wind and solar: carbon capture and storage, hydrogen and batteries.