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Lecture 14

HLTH 101 Lecture 14: Chapter 14

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Towson University
Health Science
HLTH 101
Krish Vaidya

Chapter 14 Environment Creating a healthier environment The collective interactions with the environment and short and long term health consequences of those interactions. (Global health and lifestyle) Ecosystem- a community of organisms that share a physical and chemical enviornment “Greenhouse” gases include carbon dioxide, methane and nitrous oxide. Human activities have increased greenhouse gases in the atmosphere Pollution- any change in air, water or soil that could reduce its ability to support life. The effect of pollution depends on the concentration of the pollutant, how long it remains in the environment and its chemical nature Human life can be affected by four types of pollutions 1. Air 2. Water 3. Land - soil 4. Noise Air pollution- as carbon dioxide levels in the air rise due to greenhouse effect, air quality will worsen ● Toxic substances in the air can enter the body through skin, through digestive system and through lungs. It can cause health problems such as headaches and dizziness, eye irritation and impaired vision, nasal discharge, cough, shortness of breath, and sore throat ● Smog (hazy atmosphere) ● Greenhouse gas ( a gas such as carbon dioxide) ● Greenhouse effect (warming of earth due to buildup of carbon dioxide) ● Global warming (increase in earth’s atmospheric temperature- also called climate change) ● Constricted airways ● Constricted blood vessels and increased risk of heart disease (carbon monoxide) ● Chest pains, pneumonia, symptoms of cold, lung cancer, chronic bronchitis, and respiratory symptoms ● Birth defects and reproductive problems including lower success of in-vitro fertilization ● Nausea, vomiting and stomach cancer ● Allergy and asthma from diesel fumes ● Higher mortality from strokes Water Pollution ● According to EPA water can contain 80 contaminants ● They can include heavy metals, toxic chemicals including lead, mercury, cadmium and chromium that can cause kidney and nervous system damage and birth defects ● Most common contaminants can contain parasites, bacteria, viruses, chemicals and lead ● Sources of water pollution- pesticides- fertilizers, oil spills, power plant and chemical and manufacturing plant discharge, animal farm runoff ● acid rain, and acid food- high mercury level can affect hemoglobin and central nervous system ● Sea food products, contaminated can cause major illnesses and gastrointestinal complications Land Pollution ● Sources of land pollution- solid waste, trash, agriculture, mining and industrial waste ● Open dumping, sanitary landfills, incineration, hazardous chemical dumping, pesticides, nuclear waste. random gas ● Health consequences- exposure to radiation sickness can cause fatigue, nausea, weight loss, fever, bleeding from mouth and gums, weight loss, immune deficiencies ● Radon gas- seeps into the house through cracks and joints, though water supply, drains and sump pumps and through block walls ● Noise pollution- excess noise can reduce earing clarity, disrupt emotional tranquility, infringe on social interactions and interrupt our concentration ● Can cause hearing loss, high BP, loss of peace and loss of sleep Invisible threats ● Electromagnetic fields- electric and magnetic fields ● Household appliances, TV, (electric
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