Fig. 1: Life-cycle greenhouse gas emissions intensity of various hydrogen production pathways with (left) and without (right) hydrogen indirect warming effect from atmospheric releases.
From: Effect of hydrogen leakage on the life cycle climate impacts of hydrogen supply chains
The inclusion of the indirect warming impacts of hydrogen increases equivalent greenhouse gas emissions intensity by less than 15% in most cases, depending on the production pathway. Results presented use GWP100. [SMR steam methane Reforming; CCS carbon capture and sequestration].
