Climate Change in The 21st Century: a Global Health Crisis

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About this sample

About this sample


Words: 1352 |

Pages: 3|

7 min read

Published: Feb 12, 2019

Essay grade:

Words: 1352|Pages: 3|7 min read

Published: Feb 12, 2019

Essay grade:

Table of contents

  1. Introduction
  2. Climate Change as a Global Threat
  3. Agricultural Vulnerability
    Escalating Extreme Weather Events
    Rising Sea Levels: A Looming Catastrophe
  4. Impact of Climate Change on Human Health
  5. Increased Health Risks from Extreme Heat
    Impact on Respiratory Health
    Food Security and Nutrition
    Mental Health Implications
    Vector-Borne Diseases and Waterborne Diseases
  6. Conclusion
  7. References


Climate change, driven predominantly by the excessive emission of carbon dioxide from the burning of fossil fuels, is undeniably one of the most pressing global issues of the world today. This essay delves into the multifaceted nature of climate change in the 21 century, exploring its impact on agriculture, extreme weather events, and sea-level rise. The alarming statistics and trends associated with climate change paint a grim picture of its potential consequences, making it a significant global health threat that necessitates immediate attention and concerted action.

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Climate Change as a Global Threat

Agricultural Vulnerability

To grasp the gravity of climate change's impact on global health, we must first examine its repercussions on agriculture. Agriculture is the backbone of human civilization, providing sustenance for billions of people worldwide. However, the changing climate has posed severe challenges to this essential sector.

The rapid increase in global temperatures, driven by the unprecedented emission of carbon dioxide, has disrupted traditional weather patterns. Rainfall is becoming increasingly erratic, leading to severe consequences for farmers. Droughts and floods, both exacerbated by climate change, have become more frequent and intense. The inability to predict and manage these extreme weather events has left farmers vulnerable to crop failures, which can result in food shortages and economic instability.

Moreover, rising temperatures have led to increased rates of evaporation, causing droughts to intensify. In regions like Texas and Oklahoma, where temperatures regularly soar above 100°F, prolonged droughts have become the norm. These conditions threaten not only food production but also access to clean drinking water, amplifying the health risks for communities in affected areas.

Escalating Extreme Weather Events

Another alarming facet of climate change is the escalation of extreme weather events. Heatwaves, in particular, have become more frequent and intense. The statistics reveal a troubling trend: in 2011 and 2012, the number of intense heatwaves was nearly three times the long-term average.

These heatwaves have dire health implications. High temperatures can lead to heat-related illnesses and even fatalities. Vulnerable populations, such as the elderly, children, and individuals with pre-existing health conditions, are at heightened risk. Furthermore, prolonged heatwaves can exacerbate air pollution and worsen respiratory problems, leading to increased hospitalizations and healthcare costs.

The link between human-induced climate change and the proliferation of heatwaves is undeniable. As global temperatures rise, so does the probability of extreme heat events. This creates a domino effect on public health, straining healthcare systems and putting lives at risk.

Rising Sea Levels: A Looming Catastrophe

Sea level rise, the third critical aspect of climate change, threatens to inundate coastal regions and disrupt the lives of millions. As the Earth's temperature increases, seawater expands and takes up more space, contributing significantly to sea level rise. Additionally, the accelerated melting of glaciers and polar ice caps, exacerbated by global warming, is a major contributor to this phenomenon.

The implications of sea-level rise on global health are profound. Coastal communities are at risk of displacement, leading to the forced migration of millions of people. This displacement not only disrupts lives and communities but also exacerbates existing health disparities. Access to clean water, sanitation, and healthcare becomes increasingly challenging in the face of such upheaval.

Furthermore, the threat of more frequent and severe coastal flooding raises concerns about waterborne diseases, contaminated water sources, and the spread of infections. Vulnerable populations in low-lying coastal areas are particularly susceptible to these health risks.

Impact of Climate Change on Human Health

While the previous sections discussed the direct consequences of climate change on agriculture, extreme weather events, and sea-level rise, it is essential to delve deeper into how these changes in climate patterns affect human health. Climate change acts as a catalyst, exacerbating existing health threats and creating new ones, thereby making it a formidable global health challenge.

Increased Health Risks from Extreme Heat

As global temperatures rise, prolonged and extreme heatwaves become more frequent, posing severe health risks. Heat-related illnesses, such as heat exhaustion and heatstroke, become more prevalent, particularly among vulnerable populations like the elderly and young children. Additionally, individuals with pre-existing medical conditions, such as heart disease and respiratory disorders, are more susceptible to heat-related complications.

Extreme heat also places a significant burden on healthcare systems. Hospitals experience surges in admissions due to heat-related illnesses, straining resources and increasing healthcare costs. This not only places undue stress on medical professionals but also hampers the overall capacity of healthcare systems to respond to other health emergencies.

Impact on Respiratory Health

Climate change has a direct impact on air quality, which in turn affects respiratory health. Higher temperatures promote the formation of ground-level ozone and air pollutants, exacerbating respiratory problems such as asthma and chronic obstructive pulmonary disease (COPD). Poor air quality leads to an increase in respiratory-related hospital admissions and emergency room visits.

Furthermore, wildfires, often intensified by droughts and heatwaves linked to climate change, release harmful particulate matter into the air. These fine particles can penetrate deep into the respiratory system, causing or exacerbating respiratory diseases. Smoke from wildfires can carry not only particulate matter but also toxic chemicals, posing additional health risks to communities exposed to the smoke.

Food Security and Nutrition

Climate change's adverse effects on agriculture have far-reaching consequences for food security and nutrition, which are intrinsically linked to human health. Crop failures and reduced agricultural yields can lead to food shortages, price spikes, and malnutrition, particularly in vulnerable populations. Insufficient access to a diverse and nutritious diet can result in a range of health problems, including stunted growth in children, weakened immune systems, and increased susceptibility to diseases.

Mental Health Implications

The impact of climate change on mental health cannot be overlooked. Extreme weather events, displacement due to sea-level rise, and the loss of livelihoods can contribute to stress, anxiety, depression, and post-traumatic stress disorder (PTSD). These mental health challenges are often compounded by the loss of social support systems and a sense of community, further emphasizing the need for holistic approaches to addressing climate change's health impacts.

Vector-Borne Diseases and Waterborne Diseases

Changes in temperature and precipitation patterns can alter the distribution and behavior of disease vectors, such as mosquitoes and ticks. This can lead to the spread of vector-borne diseases like malaria, dengue fever, and Lyme disease to new regions previously unaffected by these diseases. Additionally, increased flooding and extreme weather events can contaminate water sources, increasing the risk of waterborne diseases such as cholera and diarrhea, which can have severe health consequences.

Overall, the impact of climate change on human health is pervasive and multifaceted, affecting not only physical health but also mental well-being. From heat-related illnesses and respiratory problems to food security, malnutrition, and the spread of infectious diseases, climate change presents a wide array of health challenges.


In conclusion, climate change is undeniably one of the most significant global health threats in the 21st century. Its far-reaching impact on agriculture, extreme weather events, and rising sea levels poses a dire challenge to humanity's well-being. To mitigate these threats and safeguard global health, it is imperative that nations, communities, and individuals take decisive actions to reduce carbon emissions, transition to renewable energy sources, and adapt to the changing climate.

The statistics and trends presented in this essay underscore the urgency of addressing climate change as a global health crisis. Agriculture, as the foundation of our food security, is at risk; extreme weather events are becoming more perilous, with heatwaves taking a toll on human health; and sea-level rise threatens coastal communities with displacement and health challenges.

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As we confront the realities of a changing climate, it is crucial to prioritize both mitigation and adaptation strategies to protect human health and build resilient communities capable of facing the complex health threats posed by climate change. Addressing climate change is not just an environmental imperative; it is a fundamental requirement for safeguarding human health in the 21st century and beyond.


  1. United Nations. (2021). Climate Change.
  2. Food and Agriculture Organization of the United Nations. (2020). Climate Change and Food Security.
  3. National Oceanic and Atmospheric Administration (NOAA). (n.d.). Climate Change: Extreme Weather.
  4. World Health Organization (WHO). (2018). Climate Change and Health.
  5. Environmental Protection Agency (EPA). (n.d.). Climate Change Indicators: Heatwaves.
  6. Intergovernmental Panel on Climate Change (IPCC). (2019). Special Report on the Ocean and Cryosphere in a Changing Climate.
  7. United Nations. (n.d.). Climate Change: What You Need to Know.
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Climate Change in the 21st Century: A Global Health Crisis. (2019, February 11). GradesFixer. Retrieved May 19, 2024, from
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