Effects Of The Environment On Human Health – Pollution causes direct and indirect diseases. Direct: Through toxins like lead poisoning and lung cancer. Indirect: Many infectious diseases such as cholera and river blindness are spread in contaminated environments.
The World Health Organization has begun collecting data on how the environment affects human health. In a study by the World Health Organization, deaths in different regions of the world and healthy life lost due to disease were estimated in days of poor health. Research shows that in general, people in developing countries have a greater health impact. A major factor is infectious diseases, which are common among people with poor hygiene.
- 1 Effects Of The Environment On Human Health
- 2 Environment And Health. (note: This Reading Reflection Paper…
- 3 Pdf] Plastics, The Environment And Human Health: Current Consensus And Future Trends
- 4 How To Reduce Human Caused Environmental Changes
Effects Of The Environment On Human Health
Toxicology is the study of toxic substances, including their nature, effects, detection, treatment methods, and exposure control. A few pollutants have toxic, toxic effects, but any chemical can be harmful if ingested or ingested in sufficient amounts. A dose is the amount of a substance that is harmful to humans. A response to health damage caused by exposure to a certain amount of a drug.
Environment And Health. (note: This Reading Reflection Paper…
A persistent chemical is a chemical that breaks down slowly in the environment. These chemicals are dangerous because they are more likely to remain in the body. People may be exposed to persistent chemicals like DDT.
6 Epidemiology Epidemiology is the study of the distribution of disease in a population and the factors that influence the occurrence and spread of disease. When an outbreak occurs, epidemiologists collect information from health workers about when and where the disease occurred. Scientists are looking for this disease to prevent its origin and spread.
7 Epidemiology The map below shows cases of mercury poisoning in Virginia. The pattern pointed scientists to areas of mercury poisoning.
8 Risk Assessment Risk assessment is the assessment of the risk posed by a particular substance. Risk is the likelihood that a negative outcome will occur. In terms of human health, risk is the possibility of illness, injury, or death. Scientists and health professionals work together to assess the risks of pollutants. A risk assessment may lead the government to determine how and where the substance is used.
Solved Impact Of Environmental Pollution: 1) Effect On
Some pollutants occur naturally in the environment. Naturally occurring pollutants are generally harmful to health at higher than normal levels in the environment. Ex. Radon, an odorless and radioactive gas in granite beds, causes about 15,000,000,000,000 cancer cases in the United States each year. The most common pollutants from natural sources are dust, soil, and other particles.
11 Particles are airborne particles that are small enough to be inhaled into the lungs. They can be inhaled and become trapped in the tiny air sacs in our lungs. This can cause irritation, which can worsen lung conditions such as chronic bronchitis and bronchitis. Dust storms, wildfires, and volcanic eruptions all produce large amounts of particulate matter.
13 Heavy metals Another pollutant from natural sources is the so-called heavy metal. Hazardous heavy metals include elements such as arsenic, cadmium, lead and mercury. These elements occur naturally in rock and soil. Many of these elements cause nerve damage in excess.
Human activities release thousands of chemicals into the environment. We wonder about the health effects of many of these chemicals. Only 10% of commercial chemicals have been tested to be toxic, and about 1,000 new chemicals are produced each year.
Pdf] Plastics, The Environment And Human Health: Current Consensus And Future Trends
16 Burning Fuels Despite public health advances as a result of pollution control, air pollution remains a major health problem. Burning fuels in cars, furnaces, power plants, and factories introduces huge amounts of pollutants, including carbon monoxide and particulates. These pollutants and particulates contribute to premature deaths from asthma, heart disease and lung disorders every year.
17 Pesticides Pesticides are chemicals designed to kill unwanted organisms such as insects, fungi, or weeds. Pesticides help us grow more food by reducing pest damage. But because pesticides are designed to kill living organisms, they are often dangerous to humans in large amounts. Most pesticide poisonings affect people who use the chemicals. Making a case
19 Waste Disposal Most of the pollution in our environment is not adequately disposed of. Despite improvements in waste disposal methods, problems remain. The landfill overflowed. Toxic chemicals continue to enter our waterways, and incinerators release toxic products into the air. Laws regulating waste disposal are not always enforced.
Other diseases are spread by secondary hosts, such as mosquitoes. A host parasite is an organism that provides food and shelter. The chart on the slide below shows the world’s deadliest infectious diseases.
Pdf) Plastic Waste Environmental And Human Health Impacts
22 Infectious pathogens can be transmitted directly to humans through water, or organisms that carry pathogens can transmit them to humans. A vector is an intermediate host that transfers a pathogen or parasite to another organism. Extensive construction of irrigation ditches and dams increases habitat for vectors such as mosquitoes. These organisms are intermediate hosts that transmit pathogens or parasites to humans.
The most deadly waterborne diseases, such as cholera and the diseases that cause diarrhea, come from drinking water contaminated with human feces. These diseases cause the body to lose water and become dehydrated, and they cause infant mortality worldwide.
Malaria is caused by parasites and is spread by the bites of certain species of female mosquitoes. There is no effective vaccine for malaria, but preventive measures include mosquito control.
By changing the environment, we make it more suitable for pathogens to survive and reproduce. Our actions cause pathogens to develop resistance to the antibiotics used to kill them. In 1979, 6% of pneumonia bacteria in Europe were resistant to antibiotics. Ten years later, 44% were stress resistant.
Fossil Fuel Ban Would Save Lives, Say Global Health Groups
28 Emerging Viruses In recent years, medical scientists have focused on previously unknown or emerging viruses. Ex. Dengue virus, which causes dengue fever and AIDS. Most viral diseases are spread directly from person to person through cuts or mucous membranes. Our primary defense against viral diseases is vaccination. But vaccines are virus-specific, and viruses evolve quickly. As new strains of viral pathogens evolve, new vaccines must be developed.
Recently, there has been an increase in pathogens that cross species or move from one species to another. These pathogens have survived for centuries in several wild animals, often with little damage. But in humans, they can cause serious diseases. Ex. West Nile virus Some ecologists worry that with the continued destruction of species and the environment, cross-border transmission of the disease will become more common.
It is not some toxic chemical that harms human health, but disease-causing organisms. Infectious diseases are caused by pathogens, organisms or viruses that cause disease. Some of these diseases are airborne. Others are spread by water containing pathogens.
Pollution And Human Health Environmental Effects ∆ Pollution
, now and in the future. These impacts may occur locally, regionally, or nationally. The examples listed in the first column are the examples described in each chapter
Roadmap (see document guide). Moving from left to right along a health impact curve, the three middle columns show how climate drivers affect individual or community health risks and changes in health outcomes. Overall climate impacts are summarized in the final gray column. For a more comprehensive look at how climate change affects health and the environmental, institutional, social, and behavioral factors that interact to determine health outcomes, see the exposure pathway diagrams in Chapters 2-8.
Climate change is a significant threat to the health of the American people. The effects of human-caused climate change are increasing nationwide. Rising concentrations of greenhouse gases lead to rising temperatures, changes in precipitation, the frequency and intensity of some extreme weather events, and rising sea levels. This climate change harms our health through our food and water sources, the air we breathe, the weather we experience, and our interactions with the built and natural environment. As the climate changes, the risks to human health continue to increase.
Current and future climate impacts threaten the health of people in more places. Already in the United States we have seen a climate-related increase in exposure to high temperatures. More, heavier or longer lasting
How To Reduce Human Caused Environmental Changes
; Deterioration in air quality is associated with food, water, and vector-borne diseases (eg, mosquitoes and mosquitoes); and
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