The podcast episodes cover the topic of producing 'clean' hydrogen, focusing on the complexities and challenges in accurately measuring and accounting for the greenhouse gas emissions associated with different hydrogen production methods.

The episodes discuss the proposed US rules for the hydrogen production tax credit, particularly the 'three pillars' approach of additionality, time matching, and deliverability that are aimed at ensuring the tax credit incentivizes low-emission hydrogen production pathways like electrolysis using renewable energy. [Episode #224] - US Hydrogen Tax Credits and [Episode #192] - When is Hydrogen 'Clean'? dive deeper into these issues.

The potential use of nuclear power for producing clean hydrogen fuel is also explored as a decarbonization opportunity, as discussed in A nuclear COP?