Finland has been ranked as the world's happiest country for the ninth year in a row and has also achieved a significant decline in greenhouse gas emissions, particularly in the power sector. The country has seen a nearly 80% reduction in emissions from electricity generation between 2016 and 2025, with structural changes such as the phaseout of fossil-fueled electricity generation and increased use of nuclear and wind power leading to a nearly 95% carbon-neutral electricity mix. Finland has ended Russian gas imports, expanded its nuclear and wind power capacity, and aims to achieve carbon neutrality by 2030. The enactment of the Climate Change Act in 2022, the opening of Europe's largest nuclear reactor, increased wind generation, and the closure of the last active coal plant in 2025 have all contributed to significant emission declines, making Finland a global example of effective decarbonization despite a growing economy and population.