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pop growth will continue to decrease, but base pop. will still grow at 800 million in each of the next 3 decades age structure will change, fewer children born and more elderly will alter causes and patterns of death at about midcentury pop is expected to reach max of 8-10 billion if follows pattern of Europe, pop may begin to decrease as fertility rates fall below mortality |
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Progression from high to low mortality and fertility in most economically developed countries. leads to transformed age structure FIRST mortality declines while fertility is still at insanely high levels ^ natural increase (diff b/w births and deaths) accelerates causes increase in emigration |
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1. life expectancy < 35. high death rates: infectious disease 2. low death rate (infectious disease is handled by using antibodies and vaccines) 3. degenerative disease is main cause of death. life expectancy extends to 65. 4. same except for life expectancy extends to 70. infant mortality is extremely low |
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1. no individual migration. circulation for market purposes 2. rural to urban migration: agriculture frontiers international migration: europe -> usa 3. less international migration. less rural to urban. complex circulation, boarding schools. 4. migration specialized - urban to urban immigration is significant. retirement |
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traditional diets of ---- and fibers to vegetarian diets |
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Early US cities life expectancy |
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Damage to environment good for health --- ? |
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Malaysia Resettlement to Jungle - Federal Land Development Authority |
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oil changing ---- rules, no shade, no fresh produce |
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Affluence Aggravating Malnutrition |
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Impact of Urbanization on Health |
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Positive health indicators like health services, sewage systems, vaccines, birth control, antibiotics ----, ---- - less developed. breeding grounds for disease |
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urban sprawl into farmland |
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Dengue Fever (Hemorrhagic) |
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south east asia. children mosquito transmitted. causes aches and rashes |
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Land Use Changes and Rodents |
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increased urbanization = increased rodents carry disease |
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caused by exceptionally activated spring in Arizona / New Mexico increase of mice |
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similar to ebola acute viral hemorrhagic fever born in Lassa, Nigeria asymptomatic |
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outbreak in Zaire caused by infected ----. vector is fruit bat |
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Impact of Global Warming on Health |
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tropical disease affecting higher latitudes rising |
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study of interactions between atmospheric --- and living organisms |
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Electromagnetic Radiation |
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kills bacteria and viruses, wavelengths 234 µm |
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Ultraviolet Germicidal Irradiation 254 nanometers (10^-6 m) |
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24 hour rhythms, include sleep, body ----, hormones, etc. |
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light sensitivity can affect disorder sleeping problems in the elderly can influence disorder as well as difficulties adjusting to changes in longitude |
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pineal gland serotonin = morning melatonin = night |
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process in which an individual organism adjusts to a gradual change in its environment (temperature, humidity, photoperiod, or pH), allowing it to maintain performance across a range of environmental conditions. |
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caused by UVR, wind, thunderstorms inbalance in charge of atoms or molecules positive ions: lack electrons - suicides, infections negative ions: extra electrons - migraines, infections impact on pH of blood, makes blood more acidic (7+ alkaline) |
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Seasonality of Disease - Past / Present |
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summer: cholera, malaria, yellow fever
winter: flu, strokes, colds |
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in temperate conditions: winter (dry season) in tropical conditions: summer (wet season)
flu survives in dry dry nasal & throat membranes = easier virus penetration less UVR higher base metabolism more susceptible to flu many people inside with close contact |
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US: Aug - Sept. PEAK Jan - Feb mini peak
summer conception is less common b/c heat - sperm are extremely sensitive to heat |
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contamination harmful in significant quantities
AIR WATER LAND NOISE |
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Naturally Occurring Toxins |
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substances dangerous in small quantities
radon dioxin (from forest fires) fungi arsenic etc |
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Human Synthesized Organophosphates |
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retards growth of red blood cells retards copper in nervous system - neurological implications |
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not as harmful as indoor, but still harmful carbon monoxide (CO) stops O2 delivery to body |
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O3 good when in stratosphere BAD WHEN IN ATMOSPHERE NOX and VOCs turn into ozone in high heat is an irritant |
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volatile organic compounds fumes from gasoline cleaner & paint |
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nitrogen oxides (NO2) natural product of high temp explosions cars and trucks produce these |
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little pieces of dust, sand, salt, etc. <10 µm (.000001 m) (10^-6 m) < 2.5 µm are the most dangerous |
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sulfur dioxide -coal burning power plants (scrubbers) - irritant - acid rain |
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extremely harmful things such as cigarettes actual harm |
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mainly in mid-west/south >26% of pop surrounding states >24% west <20% |
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worlds most polluted city and most industrial city coal-burning city being in that air for 1 day equivalent to 5 packs a day |
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wave of leukemia in children |
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the soot over asia specifically india and china 20 % less sun prior to industrial era 5% reduction in rice yield 340,000 additional deaths over 5 years economic impact: 82 billion per year drag may be slowing global warming bc brown clouds reflect more heat than trap |
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1800s bacterial and viral contamination still a concern |
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Change Since Days of Early Industry |
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In Japan 1950s Methyl mercury in the water affected the fish (big source of their protein) caused horrible acne for people |
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~571,000 underground storage tanks store petroleum & other hazardous material greatest threat is leaking of groundwater |
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stochastic and non-stochastic health effects |
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Landfills' Impact on Health |
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hearing impairment, hypertension, ischemic heart disease, annoyance, and sleep disturbance. Changes in the immune system and birth defects have been attributed to noise exposure. induce tinnitus, hypertension, vasoconstriction, and other cardiovascular adverse effects. |
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