A study published in Communication Earth & Environment explored the impact of diversified hydrogen production on carbon emissions and energy use in major Chinese cities. By combining green and blue hydrogen, emissions could be reduced by up to 96% compared to coal-based hydrogen, supporting China's 2060 carbon neutrality goals. The research emphasizes the importance of transitioning to low-carbon hydrogen production methods like blue hydrogen and green hydrogen, derived from renewable sources. Analyzing 12 hydrogen production methods across key Chinese cities, the study highlighted the potential for significant emission reductions with diversified hydrogen production. The findings underscore the importance of leveraging local resources and technologies to design cost-effective and sustainable hydrogen production strategies. By 2060, employing a mix of hydrogen technologies customized to local conditions could lead to a substantial reduction in carbon emissions. Government support through policies like subsidies and certification standards is crucial for accelerating hydrogen adoption and enhancing energy security. The study concludes that diversified hydrogen production, along with government interventions and falling costs of renewable energy, can play a pivotal role in achieving carbon neutrality and promoting sustainable urban energy systems.