The Effects of Global Warming on Health


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The Effects of Global Warming on Health

  1. 1. The Impact of Global Warming on Health By: Momina
  2. 2. Introduction What is Global warming? What is the cause of Global warming?What is climate change and what are its affects?? What are the consequences of Global Warming The Counter Argument
  3. 3. Global warming is the trapping of greenhouse gases in theearths atmosphere. This in turn affects biodiversity. Wheneversomeone says global warming the following things just flashinto our minds: Rising Sea Levels Melting Glaciers Migration of Animals Increased Precipitation Higher Average Temperatures Have you ever thought of the affect global warming has on human health? Back to Introduction
  4. 4. First you need to understand what the greenhouse effect is.The green house effect is when the green house gases (which includecarbon dioxide, water vapour, methane and ozone and nitrous oxide) holdthe heat in the atmosphere. The purpose the greenhouse effect is keepthe Earth warm.So what’s happening now?There is an abnormal increase in greenhouse gases. This abnormal increase isbecause of human activities such as:• burning solid waste and wood• burning fossil fuels like oil, natural gas, and coal• deforestation• release of hydroflourocarbonsWhat the above activities are doing is that the they trap more than normal heat inthe atmosphere which causes global warming. Back to Introduction
  5. 5. Carbon pollution is causing climate change that drives dangerous heat wavesand worsens smog pollution. This causes asthma attacks and other seriousrespiratory illnesses.Climate change has the following affects:1. Warming temperatures increases smog pollution2. Deaths from heat related illnesses increase3. Patterns of diseases have also begun changing4. Increase in temperatures will cause water shortages. This could harm crop production; diminishing food variety, nutritional content and availability.5. Warmer air holds more moisture. This means that it is more likely to pour which increases the risk of flooding. Back to Introduction
  6. 6. High air temperatures increase the ozone concentration at ground level. The natural ozone layer in the upper atmosphere protects the earth from the sun’s harmful ultraviolet radiation; but at ground level ozone becomes a harmful pollutant that damages lung tissue and aggravates asthma and other breathing diseases. Even in healthy individuals exposure to modest levels of ozone can cause nausea, chest pain and pulmonary congestion.Worsening Air Back to Introduction Pollution
  7. 7. More illnesses and death resulting from heat waves Worsening air pollution Increase in vector-borne disease Changing food production More severe and frequent wildfires Flooding Back to Introduction
  8. 8. What is a heat wave? A heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity. Increasing severity of the heat waves will lead to more heat stroke and other heat-related illnesses and death.Evidence:In the summer of 2003 there was a heat wave in Europe that claimed about 35,000 lives.In the summer of 2007 Greece suffered a massive heat wave and had record wildfires.In the USA, heat waves account for more deaths than hurricanes, tornadoes, floods andearthquakes combined. Back to Introduction Back to consequences
  9. 9. As air pollution worsens there will be an increase in the number of respiratoryand cardiovascular diseases. This includes asthma and cardiac dysrhythmia.Air pollution worsens as a result of smog pollution.Increase in temperature raises levels of ozone and other pollutants. Thisincrease of greenhouse gases exacerbates cardiovascular and respiratorydisease.Evidence:In 2010, the American Lung Association estimated that about 23 millionAmericans suffer from asthma. Back to Introduction Back to consequences
  10. 10. Increase in heat, precipitation and humidity allows tropical and subtropical insects tomove from regions where infectious diseases thrive into new places.As temperature increases and rainfall patterns change, and summers become longer, theinsects can remain active for longer seasons and in wider areas, greatly increasing therisk for the people who live there.The following are examples of them:1. Dengue Fever: this is characterized by high fever, headaches, bone and joint aches, and a rash.2. Lyme Disease: this is transmitted primarily through bites from certain tick species. As temperatures warm, ticks are able to move into new regions.3. West Nile Virus: it spread rapidly westward across the country. The warmer temperatures, high rainfall and high humidity have increased the rate of human infection. Back to Introduction Back to consequences
  11. 11. The increasing temperatures affects the stable crop production and foodsecurity. This can be beneficial as well as damaging to the economy ofdifferent countries. For example, people who live in poor countries will have adecrease in their crop production. However in Canada, they maybe able toexpand their arable land.The prices of wheat, rice and other staples rise rapidly. Also more severeweather, like monsoons or hurricanes, can destroy and leave entirecommunities without food. Back to Introduction Back to consequences
  12. 12. Severe heat increases the frequency of wildfire. This threatens homes, lives and livelihoods and cause poor air quality.Evidence:The wildfire in California displaced more than 1 million people Back to Introduction Back to consequences
  13. 13. Flooding is often a result of rising sea levels. Often areas that are near the river deltas and coastal cities are susceptible to flooding. So what happens as a result of flood displacement? • increased transmission of water-borne disease from stagnant water • challenge of feeding and sheltering the displaced • sewage backup and squalid (extremely dirty and unpleasant) conditions • strained disaster relief resourcesEvidence:7 million people were displaced by flooding in Dhaka, Bangladesh and a flood in2004 in the same area killed 700 people. Back to Introduction Back to consequences
  14. 14. There are some people who believe that global warming is a convenientscapegoat (something that is punished for the errors of others) for putting theblame on increasing incidence of infectious diseases. They believe that thefollowing may be possible reasons:• increasing disregard for public health practices• Overcrowding of cities• Rise in population of vectors such as mosquitoes and ticks- due toinadequate control measures• Increased international travel by people that can take virus across thehemisphere• Genetic mutation in bacteria and viruses Back to Introduction