Environment, Climate Change, One Health and Migration

We work to prevent disease and promote health by addressing key areas of environmental health including climate change, clean energy; air quality; water, sanitation and hygiene (WASH); and chemicals and radiation. Health threats are addressed through a One Health approach....

Technical areas of work

Air Quality, Energy and Health

Chemical Safety and Health

Climate Change and Health

Cross-cutting

Health and migration

One Health Initiative

Radiation and health

Water Sanitation and Health (WASH)

Emergencies

Interventions

Monitoring

Settings & populations

Training

Highlights

9 – 20 November 2026

COP31 Health Pavilion

Flagship Initiative against extreme heat and related environmental health risks in workplaces and major events

News

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10 November 2026

Departmental update

From commitments to implementation: ATACH Day at COP31 delivers practical solutions for climate and health

10 November 2026

Departmental update

WHO training strengthens global capacity for healthier, more equitable cities

6 November 2026

Departmental update

WHO at COP31: Health Day opens two weeks of activities to deliver on climate change and health

4 November 2026

News release

Six climate and health actions could save 1.6 million lives and deliver trillions in benefits each year

Events

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23 – 27 November 2026

Seventh WHO Global School on Refugee and Migrant Health

13 November 2026 14:00 – 15:00 Turkey Time

COP31 event: The climate–mobility–health nexus: research as a bridge to coordinated action

9 – 20 November 2026

COP31 Health Pavilion

Speech

9 November 2026

WHO Director-General's remarks at the High-Level Roundtable on Advancing Health in the Global Climate Agenda (COP31) – 9 November 2026

Commentaries

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20 November 2025

World Toilet Day: Protecting health through safe sanitation

Videos

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15 October 2026

International Lead Poisoning Prevention Week 2026 - From Detection to Prevention

25 August 2026

Beat the Heat: Protecting health from extreme heat

25 August 2026

Managing heat risks at mass gatherings

Our strategy

WHO global strategy on health, environment and climate change: the transformation needed to improve lives and wellbeing sustainably through healthy environments

The new strategy is timely – it responds to and is in line with the 2030 Sustainable Development Agenda and the GPW13.

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Calls for

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6 November 2026

Expression of interest

Request for expressions of interest for technical support to the WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene

5 October 2026

Expression of interest

Call for consultant: lead poisoning and poison centres

Publications

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The 2025 WHO Health and Climate Change Global Survey report provides a global assessment of country-level progress in addressing the health impacts of...

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Primary health care-oriented responses for migrants, refugees and displaced populations

This eighth report in the WHO Global Evidence Review on Health and Migration (GEHM) series examines how primary health care (PHC)-oriented responses can...

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Global benefits and costs of prioritized actions on climate change and health: technical report

This technical report presents a global assessment of the health, environmental and economic benefits and costs of scaling up six prioritized climate–health...

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Climate Change, Health and Displacement 1 2026 - UNHCR & WHO Joint UNHCR-WHO Technical Brief November 2026

This joint UNHCR-WHO technical brief examines the interconnections between climate change, health and forced displacement. It highlights how climate-related...

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