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

All →

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

All →

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

All →

20 November 2025

World Toilet Day: Protecting health through safe sanitation

Videos

All →

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.

Download

Calls for

All →

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

All →

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...

Download

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...

Download

Ten years of the Paris Agreement: a global review of health in nationally determined contributions

This WHO report reviews the integration of health into the third generation of nationally determined contributions (NDCs 3.0), the national climate plans...

Download

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...

Download