German energy group Uniper SE (<a href="https://www.boerse-frankfurt.de/equity/uniper-se-na-o-n-1" target="_blank">ETR:UN0</a>), Norwegian Hydrogen AS and Australia’s Provaris Energy Ltd (A<a href="https://www.asx.com.au/markets/company/pv1" target="_blank">SX:PV1</a>) on Tuesday said they have joined forces in an initiative to supply green hydrogen from production sites in the Nordics to Germany.