A major international study has warned that the world could exceed the critical 1.5°C global warming threshold as early as 2028, if carbon emissions continue at current rates. The study, published in Earth System Science Data, reveals that just 143 billion tonnes of carbon dioxide remain in the global "carbon budget" to stay within the Paris Agreement’s 1.5°C target. At an annual rate of 46 billion tonnes, that budget will be exhausted in under three years. Scientists stress that climate change is not only worsening but accelerating, with 2024 marking the first year average global temperatures exceeded 1.5°C - though this does not yet breach the Paris threshold, which is measured over decades. The consequences of unchecked warming include rising sea levels, ocean warming, extreme weather, and irreversible environmental damage, particularly affecting the world’s poorest. While full reversal is unlikely, urgent emissions reductions could still slow the pace and severity of warming. Experts call for political will and rapid action, warning that humanity is now in a crucial window to prevent far more catastrophic outcomes.