WHO: Six Climate and Health Actions Could Save 1.6 Million Lives and Generate US$3.9 Trillion in Annual Benefits

A new World Health Organization (WHO) report reveals that six proven climate and health interventions could prevent approximately 1.6 million deaths annually, generate US$3.9 trillion in economic welfare benefits, and deliver an additional US$5.4 trillion in fiscal benefits worldwide.

The World Health Organization (WHO) has released a new report highlighting the significant health and economic benefits of investing in climate action. The findings suggest that implementing six priority interventions globally could save millions of lives while reducing greenhouse gas emissions and strengthening national economies.

The report, titled Global Benefits and Costs of Prioritized Actions on Climate Change and Health, provides a comprehensive economic assessment of six WHO-recommended interventions aimed at reducing climate-related health risks.

According to WHO, scaling up these measures could deliver a triple benefit: improved public health, reduced carbon emissions, and stronger economic performance.

Six Climate and Health Actions Recommended by WHO

The report identifies six interventions that governments and policymakers can implement to address climate-related health challenges.

1. Heat-Health Warning Systems

Early warning systems can help communities prepare for extreme heat events, reducing heat-related illnesses and deaths. These systems are among the most cost-effective interventions assessed in the report.

2. Climate-Resilient Drinking Water Services

Strengthening drinking water infrastructure can help ensure safe and reliable water supplies despite climate-related disruptions, including droughts, floods, and extreme weather events.

3. Basic Sanitation Services

Expanding access to adequate sanitation facilities can reduce exposure to infectious diseases and improve public health, particularly in vulnerable communities.

4. Hygiene and Handwashing Facilities

Improving access to hygiene infrastructure and handwashing facilities can help prevent infectious diseases and strengthen community resilience during climate-related emergencies.

5. Cleaner Household Fuels and Technologies

Promoting cleaner cooking and heating technologies can reduce household air pollution and associated health risks while supporting lower-emission energy use.

6. Efficient Fossil Fuel Pricing Policies

Reforming fossil fuel pricing, including removing inefficient subsidies and applying appropriate taxation, can help reduce air pollution, improve health outcomes, and generate substantial economic and fiscal benefits.

WHO Estimates 1.6 Million Lives Could Be Saved Every Year

WHO estimates that implementing these six measures globally could prevent approximately 1.6 million deaths annually, equivalent to roughly one in every 40 deaths worldwide, based on modelled projections.

The interventions could also help avoid 16.7 billion tonnes of carbon dioxide emissions, equivalent to approximately 31% of global annual greenhouse gas emissions when emissions from land use, land-use change, and forestry are excluded.

These findings highlight the potential for climate policies to deliver substantial public health benefits alongside environmental improvements.

Economic Benefits Could Reach US$3.9 Trillion Annually

Beyond their potential to save lives, the six interventions could generate significant economic returns.

According to the WHO analysis, scaling up the measures globally could produce:

• US$3.9 trillion annually in economic welfare benefits.

• US$5.4 trillion annually in additional fiscal benefits.

• 1.6 million fewer deaths annually through reduced climate-related and environmental health risks.

• 16.7 billion tonnes of avoided CO₂ emissions.

Across five of the assessed interventions, WHO estimates that every US$1 invested could generate approximately US$24 in benefits.

The report also indicates that low- and middle-income countries could experience particularly substantial gains, potentially helping to reduce health and economic inequalities.

Heat Health Warning Systems Offer Exceptional Economic Returns

Among the interventions assessed, heat-health warning systems stand out for their potential cost-effectiveness.

WHO estimates that these systems could generate US$835 in benefits for every US$1 invested.

Their high estimated return reflects the ability to use existing public health and meteorological infrastructure to identify extreme heat risks and communicate timely warnings.

By helping individuals, healthcare facilities, and communities prepare for dangerous temperatures, early warning systems can reduce preventable heat-related illnesses and deaths at relatively low implementation costs.

Fossil Fuel Pricing Reforms Could Deliver the Largest Overall Benefits

Efficient fossil fuel pricing policies are projected to generate the greatest overall economic and fiscal gains among the six interventions.

WHO estimates that these policies could:

• Prevent approximately 1.2 million deaths annually.

• Generate US$3 trillion in annual economic welfare benefits.

• Deliver US$5.4 trillion in annual fiscal benefits.

The proposed measures include removing inefficient fossil fuel subsidies and applying appropriate taxation to better reflect the environmental and health impacts of fossil fuel consumption.

Such policies could encourage cleaner energy use, reduce air pollution, and generate public revenues that governments may use to support broader development priorities.

WHO Calls for Health to Be Central to Global Climate Policy

WHO Director-General Dr Tedros Adhanom Ghebreyesus emphasized that climate change represents a major public health challenge, but many of its harmful consequences can be prevented using solutions already available.

The report was released ahead of the 31st United Nations Climate Change Conference (COP31), where governments are expected to discuss their climate commitments and priorities.

WHO urges governments, development partners, and financing institutions to recognize the economic value of climate-related health interventions and increase investment in measures that protect communities from environmental health risks.

Climate Change and Public Health: A Global Challenge

Climate change is increasingly associated with extreme heat, water insecurity, air pollution, and other environmental threats that affect human health.

These challenges can place additional pressure on healthcare systems, particularly in communities with limited resources and infrastructure.

The WHO findings demonstrate that investments in climate resilience can provide benefits extending beyond environmental protection.

By improving access to safe water, sanitation, clean household energy, and effective early warning systems, countries can strengthen their ability to prevent disease and respond to climate-related health emergencies.

Investing in Climate Action Means Investing in Human Health

The WHO report reinforces the importance of integrating public health considerations into national climate strategies.

Rather than viewing climate action solely as an environmental responsibility, the findings highlight its potential role in preventing premature deaths, reducing healthcare burdens, and improving economic wellbeing.

As countries prepare for COP31, WHO is calling for greater cooperation and investment to scale up interventions that can simultaneously protect human health, reduce emissions, and support sustainable economic development.

The report concludes that proven climate and health measures offer an opportunity to deliver substantial benefits for people, the environment, and economies worldwide.

 

Reference

World Health Organization (WHO) — Global Benefits and Costs of Prioritized Actions on Climate Change and Health