In a significant move, the UK has made history by becoming the first major nation to cease the use of coal in electricity generation, marking the end of over 140 years of reliance on this fossil fuel. The closure of the Ratcliffe-on-Soar plant on September 30 is a notable step in the UK's overarching goal to have all electricity generated from clean sources by 2035. This initiative sets a precedent for other nations aiming to transition towards renewable energy. However, in contrast to the UK's achievement, countries in Asia such as Japan and South Korea, with a heavier dependence on coal and limited access to natural gas and renewable infrastructure, are exploring alternative solutions like ammonia co-firing to curb emissions while ensuring energy security. Additionally, Wärtsilä Energy's Rethinking Energy in Southeast Asia report underscores the potential of green hydrogen-based fuels in facilitating seasonal power balancing in the region. This shift towards cleaner energy sources not only contributes to reducing carbon emissions but also enhances energy security in the long run.