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Climate Change and Human Health

Climate change is one of the most pressing issues facing humanity today. The global rise in temperatures and its associated impacts have far-reaching effects on the environment and human health. From air quality to water quality, from extreme weather events to displacement, the effects of climate change are felt in many areas of our lives. 

Getting Started

Studies have shown that climate change and health are intertwined. This article will delve into climate change and its associated health threats. Understanding the risks of climate change is crucial for protecting ourselves and our loved ones.

We have information on what to expect, and what you can do to work towards solving the climate crisis.

Table of Contents

Key Takeaway

The impacts of climate change on human health highlight the urgent need for action. Governments, organizations, and individuals must work together to mitigate the effects of climate change and reduce its impact on human health. This requires a collective effort to reduce emissions, increase resilience, and adapt to the changing climate.

Risk Level

Rising Sea Levels: This can lead to flooding in coastal areas, loss of valuable land, and displacement of communities.

Increasing Weather Events: These events can be devastating for infrastructure, crops, human health, and other aspects of society.

Diminishing Crop Yields: This can lead to food insecurity in some parts of the world and threatens global agricultural systems.

Species Extinction: This can have far-reaching impacts on the environment, including changes in the composition of ecosystems and loss of valuable genetic diversity.

Climate Change Overview

Explanation of Climate Change

Climate change refers to long-term changes in temperature, precipitation, wind patterns, and other measures of climate that occur over several decades or longer. The Earth’s climate has always changed throughout history.

Still, the current warming trend is of particular concern because it is largely driven by human activity, such as burning fossil fuels, deforestation, and land-use change. As a result, global temperatures have risen, leading to changes in climate patterns and increasing the frequency and intensity of extreme climate events.

The Effects of Climate Change on Human Health

Climate change affects health in diverse and far-reaching ways. Changes in temperature, air and water quality, and weather patterns can all negatively impact our health. For example, worsening air quality levels can lead to respiratory problems like asthma and bronchitis, and contaminated water sources can accelerate water-borne diseases. Additionally, these weather events such as hurricanes, floods, and heat waves can cause physical injuries, displace populations, and lead to widespread mental health issues.
In the United States a lack of health equity means that the negative impacts disproportionately harm those with underlying health conditions.

Importance of Understanding the Risks

Given the significant impact that climate change can have on public health, it is important to understand the risks involved. By taking proactive measures to reduce our exposure to the effects of climate change, we can better protect ourselves and our loved ones. This can involve lifestyle changes, such as reducing our carbon footprint and community preparedness, such as ensuring access to clean water and air. By taking action now, we can help ensure a healthier and more sustainable future for generations.

Do Scientists Agree on Climate Change?

The consensus is clear: climate change is real and its primary cause is human activity. Yet there are still questions that need answering, and further research is needed in order to gain a full understanding of the situation.

Effects on Air Quality

Climate change significantly impacts air quality, leading to negative consequences for human health. In this section, we will examine the effects of climate change on air quality and the resulting health risks.

Increased Air Pollution Levels

As temperatures rise, pollution levels also increase. This is due to the increased emission of greenhouse gases and pollutants from human activities, such as burning fossil fuels and industrial processes. The increased pollution levels can significantly impact respiratory health, particularly for vulnerable populations.

Respiratory Health Problems

Pollution levels directly impact respiratory problems, such as asthma, bronchitis, and other chronic respiratory conditions. These conditions can affect an individual’s quality of life, causing difficulty breathing, chest pain, and increased susceptibility to infections.

In severe cases, respiratory problems can lead to hospitalization and even death.

The True Cost of Coal

Coal mining and burning releases a variety of toxic pollutants into the air, water, and soil, putting the health of workers, communities, and the environment at risk. The health effects of coal are far-reaching and devastating. 

Learn More

Health Risks for Vulnerable Populations

Vulnerable populations, such as children, the elderly, and those with pre-existing respiratory conditions, are at a higher risk of experiencing negative health impacts from poor air quality. For children, exposure to air pollution can have lasting effects, impacting their development and increasing the likelihood of respiratory problems later in life. For the elderly and those with pre-existing conditions, exposure to increased pollution levels can exacerbate their symptoms, making it more difficult to manage their condition and leading to a decreased quality of life.

Effects on Water Quality

Contaminated Water Sources

Climate change is leading to severe consequences for water quality around the world. Rising temperatures and extreme weather conditions are causing an increase in water contamination levels, putting public health at risk. One of the major ways climate change impacts water quality is through increased runoff of pollutants into bodies of water and the frequency and severity of natural disasters, such as hurricanes and floods, which can damage sewage and water treatment facilities.

Spread of Water-Borne Diseases

One of the most significant impacts of contaminated water sources is the spread of water and vector borne diseases. Climate change is leading to an increase in water-borne illnesses such as cholera and typhoid fever due to the warmer temperatures and changing rainfall patterns that create favorable conditions for the growth and spread of disease-causing pathogens. Contaminated water sources also risk food security, as crops and livestock rely on access to clean water for irrigation and consumption.

Food and Water Security

Food and water security are closely intertwined, and climate change significantly impacts both. As water sources become increasingly contaminated, access to clean water for both human consumption and agricultural production becomes limited, leading to decreased food security. The impacts of climate change on water quality and food security are particularly severe in developing countries, where access to clean water and adequate food is already limited. As a result, it is essential to understand the risks associated with climate change and take proactive measures to mitigate its impacts on water quality and food security.

Effects on Temperature and Weather

The changing climate has caused a significant shift in temperature and weather patterns worldwide, which can severely impact public health. Climate change is causing severe storms and other extreme events, such as heatwaves and cold snaps, that can pose a significant risk to public health.

Extreme Weather Events

Events such as hurricanes, floods, and droughts have become more frequent and intense due to climate change. These events can disrupt essential services and infrastructure, causing widespread damage and displacement of communities. They also put additional stress on the healthcare system, making it difficult for people to access medical care in the aftermath of such events.

The True Cost of Coal

Coal mining and burning releases a variety of toxic pollutants into the air, water, and soil, putting the health of workers, communities, and the environment at risk. The health effects of coal are far-reaching and devastating. 

Learn More

Heatwaves and their Impact on Health

Extreme heat events are becoming increasingly common and intense due to climate change, with temperatures often reaching record-breaking levels. Heat stress can severely impact health, increasing the risk of heat exhaustion, heatstroke, and other heat-related illnesses. The elderly, children and those with chronic medical conditions are particularly vulnerable to the impacts of heatwaves, as their bodies are less able to regulate their temperature and maintain hydration levels.

Cold Snaps and their Impact on Health

Climate change can also lead to cold snaps, which cause health threats, especially in regions that are not well-equipped to deal with such low temperatures. Cold snaps increase the risk of hypothermia and other cold-related illnesses and can be particularly dangerous for vulnerable populations, such as the elderly and those with chronic medical conditions. In addition, the harsh winter conditions can cause roads and highways to become hazardous, making it difficult for people to access medical care during these events.

Learn More

Protecting Your Health in a Changing Climate

As the global climate continues to change, it is increasingly important to be aware of the potential health impacts and take steps to protect ourselves and our communities. This section will discuss practical tips for staying safe, the importance of community preparedness, and lifestyle changes that can reduce your carbon footprint and contribute to a healthier planet.

Practical Tips for Staying Safe

In a changing climate, you can take several practical steps to protect yourself and your family. These include staying informed about intense weather conditions, such as heat waves and cold snaps, and taking precautions to avoid heat exhaustion or hypothermia. It is also important to stay hydrated, especially during hot weather, and to take care when participating in outdoor activities, such as hiking or camping, that may expose you to increased health risks.

In addition, it is important to be aware of the increased risk of water-borne diseases and to take steps to ensure that the water you drink is safe and free from contaminants. This may involve using a water filtration system, boiling water before drinking, or purchasing bottled water.

Community preparedness is a crucial aspect of addressing the health impacts of climate change. By working together to build resilience and implement adaptive measures, we can protect the health and well-being of our communities and reduce the severity of future climate-related health impacts

Community Preparedness

The impacts of a changing climate can be felt far beyond the individual level. Communities must also be prepared for natural disasters, such as hurricanes, floods, and earthquakes, and the displacement and forced migration resulting from these events. Preparing as a community can help reduce the risk of injury and death and the psychological stress that can result from these events.

Community preparedness includes having an evacuation plan in place, stockpiling essential supplies, and educating community members about the dangers associated with extreme weather conditions. Additionally, it is essential to work with local organizations, such as community centers, schools, and faith-based organizations, to build resilience and support networks that can help families recover after a disaster.

How to Fight Climate Change

Getting started with a vegan diet can seem daunting, but with the right resources and approach, it can be a positive and fulfilling change. Here are some steps you can take to get started:

  1. Reduce energy consumption by turning off lights and electronics when not in use, and using energy-efficient appliances.

  2. Reduce water consumption by fixing leaks, taking shorter showers, and installing low-flow toilets and showerheads.

  3. Reduce waste by recycling, composting, and reducing the use of single-use plastics.

  4. Choose sustainable transportation options such as walking, biking, carpooling, or using public transportation.

  5. Reduce your carbon footprint by eating a plant-based diet, or reducing your consumption of meat, dairy, and other animal products.

  6. Support renewable energy sources such as wind and solar power by purchasing renewable energy credits or investing in a renewable energy fund.

  7. Use energy-efficient products and appliances, such as LED light bulbs, Energy Star certified electronics, and low-flow showerheads.

  8. Support policies and organizations that work to reduce greenhouse gas emissions and address the impacts of climate change.

  9. Educate yourself and others about the importance of reducing carbon emissions and taking action on climate change.

  10. Plant trees, support reforestation efforts, and participate in beach and park cleanups to help absorb carbon dioxide and restore natural habitats.

What about Health Services?

Health care facilities in the United States, and globally, will also be impacted by the effects of climate change. The increasing frequency and intensity of natural disasters, such as hurricanes and floods, will likely result in the loss of critical infrastructure, such as hospitals and clinics, as well as the disruption of supply chains for essential medical products and equipment. This will result in reduced access to essential health care services, and increase the demand for emergency medical services, particularly in low- and middle-income countries where health care systems are often less resilient.

Access to health services may also be impacted by climate change as a result of displacement and migration. Climate-induced displacement and migration may result in people being separated from their homes, communities, and health care providers, leading to increased risk of illness, injury, and death. In addition, people who are forced to migrate may face new and unfamiliar health risks, including exposure to new diseases and environmental toxins, as well as increased risk of violence and other forms of conflict.


Recap of the Impact of Climate Change on Human Health

Climate change has a profound impact on human health. The consequences of a changing climate are far-reaching and potentially life-threatening, from extreme weather events to the spread of water-borne diseases and contaminated water sources. The increased frequency and severity of natural disasters, displacement and forced migration, and the impacts on food and water security, temperature, and weather patterns all contribute to the deterioration of human health.

Climate change’s health impacts will significantly strain the health care system in the United States, requiring increased resources and funding to address these challenges and protect public health effectively. Without immediate action our health system will eventually be overwhelmed.

The Urgent Need for Action

Climate change and health is a pressing issue, posing an immense risk to humans. To prevent further harm from climate change and its consequences, governments, companies, and individuals must reassess their actions to reduce carbon emissions and make our societies more resilient against the changing environment. Working together as one united global force can effectively diminish these threats posed by climate change.

Final Thoughts

While it is important to take collective action to address the problem of climate change, it is equally important for individuals to take steps to protect themselves and their loved ones. By making lifestyle changes to reduce your carbon footprint, being prepared for extreme weather events, and taking practical steps to stay safe in a changing climate, you can help ensure your health and well-being in a world affected by climate change.

Frequently Asked Questions

As global temperatures rise, the warmer surface water of the oceans expands, reducing the density of the waters below. This hinders the ocean’s ability to absorb carbon dioxide from the atmosphere and can affect ocean currents, which can in turn alter weather patterns on a global scale.

Climate change adaptation refers to strategies used to cope with changes resulting from climate change, such as rising sea levels or increasing extreme weather events. These strategies can include disaster mitigation measures (e.g. stronger building codes) as well as changes in agricultural practices or land use planning that are designed to better withstand changing climates.

Emergency preparedness and response refers to measures taken to prepare for and respond quickly and effectively in the event of an extreme weather event or natural disaster caused by climate change. This includes developing emergency plans, training staff and volunteers, procuring resources (e.g., supplies), coordinating coordination between local governments and agencies, etc.

Climate change can lead to changes in temperature and precipitation patterns which may favor new vectors for transmitting diseases from one species to another (e.g., ticks). Additionally, population shifts due to migration away from vulnerable or uninhabitable areas can cause increases in certain diseases as well as persistence of others that were previously uncommon.


  1. “The Impacts of Climate Change on the Health of the American People” (National Academies of Sciences, Engineering, and Medicine, 2016) –
  2. “Climate Change, Health, and Equity in the United States: A Scientific Assessment” (U.S. Global Change Research Program, 2016) –
  3. “Climate Change and Health in the United States: A National Assessment of Vulnerability” (Centers for Disease Control and Prevention, 2014) –
  4. “The Public Health Impacts of Climate Change in the United States: A Scientific Review” (Annual Review of Public Health, 2018) –
  5. Climate change and health. (2021, November 30). World Health Organization.
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