A Decade On: The Unseen Costs of Lagging Climate Action [Report]
A new Lancet Countdown report reveals a stark truth: a decade after the Paris Agreement, climate change's health impacts are accelerating faster than ever, costing millions of lives. From extreme heat to widespread drought and disease, these harms are worsening globally, disproportionately affecting vulnerable nations. Despite some progress in clean energy, the world's slow transition and continued reliance on fossil fuels mean we are failing to meet the speed and scale of this urgent health crisis, demanding immediate, intensified action.
The 10th annual Lancet Countdown report, a collaboration of 146 researchers and the World Health Organization, paints a grim picture: health harms from climate change have accelerated significantly since the Paris Agreement. Record levels of greenhouse gas emissions are fueling this crisis, making extreme weather events more common and deadly.
Globally, heat, famine, disaster, and disease are claiming millions of lives, with the burden falling heaviest on lower-income countries that have contributed least to the problem. In 2023 alone, extreme heat was linked to an estimated 710,000 deaths, surpassing the toll of HIV or malaria in the same year, and over 70% of these were due to human-caused climate change. This rising heat also has severe economic consequences, costing the global economy an estimated $1.07 trillion in lost potential income as people are unable to work.
Droughts and extreme rainfall are also becoming more frequent, threatening food security and increasing the risk of floods and waterborne diseases. The report urges world leaders to declare climate change a global health emergency and to place health at the forefront of discussions at the upcoming COP31 climate conference. It’s a clear call for immediate, decisive action to transition away from fossil fuels.
There is a glimmer of hope: investments in clean energy have shown real benefits. Between 2016 and 2023, cleaner air from these initiatives averted an estimated 323,000 annual deaths in some countries. This demonstrates the immense potential of electrification and sustainable solutions to protect human health and improve lives. However, these gains are currently offset by worsening conditions elsewhere, highlighting the urgency of a much broader, faster shift to clean energy worldwide.
Addressing this crisis requires more than just talk. International funds, like the U.N. Loss and Damage Fund, must become more accessible and impactful to support nations on the front lines. Experts emphasize that healthcare systems, no matter how resilient, cannot cope with runaway climate change. Getting a handle on the drivers of climate change – primarily fossil fuels – is essential for the future of human health.