HPEX 357 Lecture 17: lecture 17 Environmental Health

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Virginia Commonwealth University
Health, Physical Education and Exercise Science
HPEX 357

Environmental Health • Environmental Helth o Collective interactions of humans with their environment and health consequenes of these interactions ▪ Environmental pollutants ▪ Technological advances ▪ Rapid population growth • Environmental health infrastructure o Needs updated ▪ Surveillance systems ▪ Measurc chemicals in people ▪ Lead surveillance in children o Importance of clean water, sanitary waste disposal, safe food and insect and ordent control • World population o What may cap the population ▪ What food ▪ Available land and water ▪ Energy ▪ Minimum acceptable standard of living o Population demand for resources already exceeds Earths by 20% • Air quality and pollution o Used for five major air pollutants ▪ CO ▪ SO2 ▪ NO2 ▪ Particular matter ▪ Ground-level ozone o AQI values run from 0 to 500 (0 good, 500 bad) ▪ The higher the AQI, the greater the health danger ▪ Available n newspapers, tv, radio, internet ▪ Burning of fossil fuels in vehicle snad industrial processes major sources of pollutants • Air Quality and Ozone o Smog is a mixture of pollutants ▪ Ground-level ozone is key ingredient ▪ Heavy motor vehicle traffic, high temps, and sunny weather o Ground level or “bad” ozone is created by chemical reactions between oxides of nitrogen and volatile organic compounds (VOC) in the presence of sunlight o Breathing ozone can trigger a variety of health problems, (children, elderly, and people all ages with lung diseases such as asthma o Has great oxidizing potential ▪ Damge mucous and respiratory tissues in animals, and also tissues in plants ▪ Ozone is worse in the afternoon and early evening • Ozone o Form of o2 o Harmful in lower atmosphere o Effects ▪ Premature death ▪ Shortness of breath • Particular pollution o Small particles in air that get trapped in lungs o Effects ▪ Increased risk of heart attacks and stroke in elderly ▪ Diminishes lung functioni n everyone ▪ Increases number and severity of asthma attacks • Volatile Organic Compounds o Large group o f carbon based chemicals that easi
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