1. Historic Paris agreement on climate change,2015
2. Global warming of 1.5 °C,2018
3. Euroean Green Deal: striving to be the first climate-neutral continent;Eu,2019
4. A review on the role, cost and value of hydrogen energy systems for deep decarbonisation;Parra;Renew Sustain Energy Rev,2019
5. Hydrogen Roadmap Europe: a sustainable pathway for the European energy transition,2019