1. IPCC Climate Change 2018: Summary for Policymakers. In Special Report on Global Warming of 1.5 °C (eds Masson-Delmotte, V. et al.) (IPCC, 2018).
2. Fourth IMO GHG Study 2020 (IMO, 2020); https://www.imo.org/en/OurWork/145Environment/Pages/Fourth-IMO-Greenhouse-Gas-Study-2020.aspx
3. Bird, F., Clarke, A., Davies, P. & Surkovic, E. Ammonia: Zero–Carbon Fertiliser, Fuel and Energy Store (The Royal Society, 2020); https://royalsociety.org/-/media/policy/projects/green-ammonia/green-ammonia-policy-briefing.pdf
4. Imhoff, T. B., Gkantonas, S. & Mastorakos, E. Energies 14, 7447 (2021).
5. Stolz, B., Held, M., Georges, G. & Boulouchos, K. Nat. Energy 7, 203–212 (2022).