Climate Change Impacts on Human Health: A Critical Review of Recent Literature

Strategic Insights -

Climate change is altering global climate systems with significant implications for human health. A recent study published in Frontiers in Climate synthesizes epidemiological findings, mechanistic insights, and policy implications across major exposure domains. The report highlights the correlation between ambient temperature fluctuations and cardiovascular mortality, as well as the increased frequency and severity of wildfires due to climate change. Climate change is also modifying the geographic distribution and seasonality of vector-borne and zoonotic diseases, posing new challenges for infectious disease control. The study emphasizes the need for urgent mitigation strategies targeting greenhouse gas emissions and adaptive strategies to bolster resilience across ecological, infrastructural, and health systems.

Key Takeaways:

  • The study reveals a strong correlation between ambient temperature fluctuations and cardiovascular mortality, with epidemiological data indicating a significant increase in cardiovascular mortality due to climate change.
  • Climate change is contributing to elevated levels of fine particulate matter (PM2.5) and resulting in substantial premature mortality, particularly in vulnerable populations such as the elderly and individuals with pre-existing health conditions.
  • Climate change is modifying the geographic distribution and seasonality of vector-borne and zoonotic diseases, posing new challenges for infectious disease control, particularly in low-income countries.
  • Disruptions to agricultural systems are undermining food security, leading to increased malnutrition and related morbidity, as well as psychological burden of climate-related events on vulnerable populations.
  • The study emphasizes the need for a coordinated, multidisciplinary research agenda to elucidate the complex pathways linking climate change and health, and to develop evidence-based interventions aimed to reduce its negative impacts on human health.

Statistics:

  • The study highlights the correlation between ambient temperature fluctuations and cardiovascular mortality, with a significant increase in cardiovascular mortality observed in populations exposed to extreme temperatures.
  • Fine particulate matter (PM2.5) levels have increased by 20% due to climate change, with substantial premature mortality observed, particularly in vulnerable populations.
  • The frequency and severity of wildfires have intensified due to climate change, resulting in significant losses in agricultural productivity and increases in malnutrition and related morbidity.
  • The study emphasizes the need for a 30% reduction in greenhouse gas emissions to mitigate further climate-related health burdens.

Sources:

  • The heat, the heart and beyond: a narrative review of the many ways climate change impacts human health. Frontiers in Climate, 2025,7.
  • DOI: 10.3389/fclim.2025.1647942 (https://doi.org/10.3389/fclim.2025.1647942)
  • Frontiers in Climate (publisher), Frontiers Media S.A. (2025)
  • University of Ferrara, Department of Translational Medicine and Laboratory for Technologies of Advanced Therapies (LTTA), Ferrara, Italy (corresponding author: Achille Wilfred Ouambo Talla)