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Lead: A Milestone Reflection on Climate ActionIn its 250th edition, the Guardian's Down to Earth newsletter pauses to assess how the world's fight against climate change has unfolded since the high‑water mark of Cop26 in Glasgow, 2021.Looking Back: Cop26’s Promise and the Five‑Year Journey2021‑2022: Nations pledged to limit warming to 1.5°C, set net‑zero targets and pledged to phase out coal.2022‑2023: The Russian invasion of Ukraine and the Iran‑oil conflict drove crude prices above $100 /barrel, exposing fossil‑fuel vulnerabilities.2024‑2025: Populist governments rolled back environmental regulations, while renewable technology became cheaper and more widespread.Numbers That Matter: Public Awareness and Emissions GapsThe “Covering Climate Now” survey found that 80‑89 % of the global public recognise the climate threat and demand government action.Current national plans still point to a projected warming of about 2.8 °C, well above the agreed target.Renewable energy costs have fallen by roughly 70 % since 2020, making clean power “cheap, widely available and overwhelmingly popular.”Why the Momentum Slowed: Geopolitics, Economics and PopulismWar‑driven spikes in oil prices, the re‑election of climate‑skeptical leaders and the rise of populist rhetoric have eroded the optimism that surrounded Cop26, pushing many countries to backtrack on commitments.What Lies Ahead: Hopeful Trends and Persistent ChallengesDespite setbacks, advances in clean‑tech, growing public pressure and emerging green‑economy initiatives suggest a pathway forward, but the intertwined climate‑biodiversity‑economy crises demand coordinated global action.