Environment, Climate Change, One Health and Migration

The Department for Environment, Climate Change, One Health and Migration works 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 that crosses the human, animal, and environmental sectors. It also promotes inclusive health policies and resilient health systems to meet the needs of migrants, refugees and displaced populations.

More about us

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

18 – 24 October 2026

International Lead Poisoning Prevention Week 2026 - From detection to prevention

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

News

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25 August 2026

Departmental update

People, animals, plants, ecosystems: making the case for investing in One Health

20 August 2026

Departmental update

New WHO online course strengthens safe and sustainable health-care waste management

18 August 2026

Departmental update

WHO/UNICEF report highlights gaps in health facility sanitation

14 August 2026

Departmental update

Quadripartite collaboration extends the One Health Joint Plan of Action to 2029

Events

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23 – 27 November 2026

Seventh WHO Global School on Refugee and Migrant Health

9 – 20 November 2026

COP31 Health Pavilion

International lead poisoning prevention week

18 – 24 October 2026

International Lead Poisoning Prevention Week 2026 - From detection to prevention

Speech

2 July 2026

WHO Director-General's opening remarks at the media briefing – 2 July 2026

Commentaries

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20 November 2025

World Toilet Day: Protecting health through safe sanitation

Videos

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31 August 2026

Meet Abdul-Fatawu Salifu, the newest ATACH Champion

25 August 2026

Beat the Heat: Staying safe at mass gatherings events

25 August 2026

Beat the Heat: Protecting health from extreme heat

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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18 September 2026

Call for consultant

Call for consultant – Health sector capacity on heat, air quality and health

18 September 2026

Call for consultant

Call for consultant – WHO Academy and capacity building

Publications

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Key ingested per- and poly-fluoroalkyl substances (PFAS) and their health effects: landscape review

The World Health Organization (WHO) commissioned a landscape review to systematically collect and assess available data sources on PFAS occurrence and...

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Health effects of air pollution: evidence and implications: technical brief

Air pollution is the leading environmental health risk factor causing about 6.6 million deaths globally every year. Currently reported as Sustainable Development...

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Second global conference on air pollution and health: key themes and outcomes

Air pollution remains one of the leading environmental risks to health globally, contributing to an estimated seven million premature deaths each year...

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To support the Quadripartite in accelerating the One Health Joint Plan of Action (OH JPA), the One Health High-Level Expert Panel (OHHLEP) has analyzed...

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