The European Union is on the verge of establishing a crucial definition for low-carbon hydrogen, integral for the continent's shift towards sustainable and cleaner energy sources. The European Commission has initiated a four-month public consultation to gather feedback on this definition, emphasizing its importance in replacing natural gas and supporting the chemical industry. The EU's renewables framework mandates a gradual transition to clearly defined 'green' hydrogen, a term that has been a topic of contention within the industry. Now, the focus has shifted towards defining 'low-carbon' hydrogen, a designation that will have significant implications, especially in the EU's new gas market rules. The proposed criteria suggest that for hydrogen to be considered 'low-carbon', it must emit only 30% of the emissions of the fuel it is replacing. Three methods have been put forward for calculating carbon emissions, all highlighting the carbon intensity of the electricity used in hydrogen production. These methods include assessing the CO2 intensity of a country's electricity mix, aligning production with renewable energy periods, and considering the exact CO2 intensity of regional grids. Jens Geier, an MEP from Germany closely involved in the new gas market rules, has stressed the importance of flexibility and continuous improvement in the proposed regulations. The consultation process aims to provide legal certainty to both producers and users, ensuring a smooth transition towards cleaner energy sources. Once the consultation phase concludes, a final proposal will be presented, subject to approval by EU countries and the European Parliament. This initiative signifies a significant step forward in the EU's efforts to promote low-carbon hydrogen and foster a more sustainable energy landscape.