By Hon. Prof. Kariuki Muigua, OGW, PhD, C.Arb, FCIArb is a Professor of Environmental Law and Dispute Resolution at the University of Nairobi, Member of Permanent Court of Arbitration, Leading Environmental Law Scholar, Respected Sustainable Development Policy Advisor, Top Natural Resources Lawyer, Highly-Regarded Dispute Resolution Expert and Awardee of the Order of Grand Warrior (OGW) of Kenya by H.E. the President of Republic of Kenya. He is The African ADR Practitioner of the Year 2022, The African Arbitrator of the Year 2022, ADR Practitioner of the Year in Kenya 2021, CIArb (Kenya) Lifetime Achievement Award 2021 and ADR Publisher of the Year 2021 and Author of the Kenya’s First ESG Book: Embracing Environmental Social and Governance (ESG) tenets for Sustainable Development” (Glenwood, Nairobi, July 2023) and Kenya’s First Two Climate Change Law Book: Combating Climate Change for Sustainability (Glenwood, Nairobi, October 2023), Achieving Climate Justice for Development (Glenwood, Nairobi, October 2023) and Promoting Rule of Law for Sustainable Development (Glenwood, Nairobi, January 2024)*
According to the United Nations, the impacts of climate change are already harming health, through air pollution, diseases, extreme weather events, forced displacement, pressures on mental health, and increased hunger and poor nutrition in places where people cannot grow or find sufficient food. The World Health Organization (WHO) also identifies climate change as a fundamental threat to human health.
According to WHO, climate change affects the physical environment as well as all aspects of both natural and human systems – including social and economic conditions and the functioning of health systems. WHO further asserts that climate change is a threat multiplier, undermining and potentially reversing decades of health progress across the world. It has rightly been pointed out that as climatic conditions change, more frequent and intensifying weather and climate events are observed, including severe storms, extreme heat, floods, droughts and wildfires. WHO points out that these weather and climate hazards affect health both directly and indirectly, increasing the risk of deaths, noncommunicable diseases, the emergence and spread of infectious diseases, and health emergencies.
Climate change is therefore a threat health to human health and well-being since it affects the food we eat, the water we drink, the air we breathe, and the weather we experience. It has been argued that as the global climate crisis worsens, its devastating impacts on human health and well-being will also accelerate. Climate change is increasing heat-related illnesses and deaths; changing the patterns of infectious disease transmission, making deadly disease outbreaks and pandemics more likely; worsening maternal and child health outcomes; and intensifying health impacts from extreme weather events such as floods, droughts, wildfires, and windstorms.
Further, it has been pointed out that climate shocks and growing stresses such as changing temperature and precipitation patterns, drought, floods and rising sea levels contribute to environmental degradation and affect social determinants of physical and mental health. It has been argued that all aspects and determinants of health are affected by climate change, from clean air, water and soil to food systems and livelihoods.
Climate change is rapidly affecting access to basic human needs including food, safe drinking water and sanitation, and clean air therefore affecting both physical and mental health. Climate change is therefore affecting health through direct impacts such as heat waves, droughts, heavy storms, and sea-level rise, and indirect impacts including vector-borne and airways diseases, food and water insecurity, undernutrition, and forced displacements.
Climate change is also affecting global health systems. It has been pointed out that the climate crisis exerts significant strains on health systems, simultaneously increasing demand for health services whilst also impairing the system’s ability to respond. Further, according to WHO, climate change is impacting the health workforce and infrastructure, reducing capacity to provide universal health coverage (UHC).
From the foregoing, it is evident that climate change is major threat to health. The WHO projects that between the years 2030 and 2050, climate change is expected to cause approximately 250, 000 additional deaths per year, from health problems such as undernutrition, malaria, diarrhoea and heat stress alone. It further estimates that the direct damage costs to health as result of climate change (excluding costs in health-determining sectors such as agriculture and water and sanitation) to be between US$ 2–4 billion per year by 2030.
It has rightly been pointed out that the severity of health risks as a result of climate change will depend on the ability of public health and safety systems to address or prepare for these changing threats, as well as factors such as an individual’s behavior, age, gender, and economic status. It has been argued that people in developing countries may be the most vulnerable to health risks as a result of climate change. The WHO also asserts that areas with weak health infrastructure mostly in developing countries will be the least able to cope with health risks associated with climate change without assistance to prepare and respond.
Placing health at the centre of climate action is therefore an urgent concern. If left unaddressed, the climate crisis threatens to undo years of progress in development, global health and poverty reduction, and to further widen existing health inequalities between and within populations. It also severely jeopardizes the realization of UHC in various ways, including by compounding the existing burden of disease and by exacerbating existing barriers to accessing health services, often at the times when they are most needed. In addition, it has been asserted that the negative health effects of climate change could drive nearly 40 million people globally into extreme poverty by the year 2030. It is therefore necessary for all countries to place health at the centre of climate action.
*This is an extract from the Book: Promoting Rule of Law for Sustainable Development (Glenwood, Nairobi, January 2024) by Hon. Prof. Kariuki Muigua, OGW, PhD, Professor of Environmental Law and Dispute Resolution, Senior Advocate of Kenya, Chartered Arbitrator, Kenya’s ADR Practitioner of the Year 2021 (Nairobi Legal Awards), ADR Lifetime Achievement Award 2021 (CIArb Kenya), African Arbitrator of the Year 2022, Africa ADR Practitioner of the Year 2022, Member of National Environment Tribunal (NET) Emeritus (2017 to 2023) and Member of Permanent Court of Arbitration nominated by Republic of Kenya. Prof. Kariuki Muigua is a foremost Environmental Law and Natural Resources Lawyer and Scholar, Sustainable Development Advocate and Conflict Management Expert in Kenya. Prof. Kariuki Muigua teaches Environmental Law and Dispute resolution at the University of Nairobi School of Law, The Center for Advanced Studies in Environmental Law and Policy (CASELAP) and Wangari Maathai Institute for Peace and Environmental Studies. He has published numerous books and articles on Environmental Law, Environmental Justice Conflict Management, Alternative Dispute Resolution and Sustainable Development. Prof. Muigua is also a Chartered Arbitrator, an Accredited Mediator, the Managing Partner of Kariuki Muigua & Co. Advocates and Africa Trustee Emeritus of the Chartered Institute of Arbitrators 2019-2022. Prof. Muigua is a 2023 recipient of President of the Republic of Kenya Order of Grand Warrior (OGW) Award for his service to the Nation as a Distinguished Expert, Academic and Scholar in Dispute Resolution and recognized among the top 5 leading lawyers and dispute resolution experts in Band 1 in Kenya by the Chambers Global Guide 2024 and was listed in the Inaugural THE LAWYER AFRICA Litigation Hall of Fame 2023 as one of the Top 50 Most Distinguished Litigation Lawyers in Kenya and the Top Arbitrator in Kenya in 2023.
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