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Lecture 10

HLSC 1F90 Lecture Notes - Lecture 10: Leptospirosis


Department
Health Sciences
Course Code
HLSC 1F90
Professor
Dr.Kelli-an Lawrance
Lecture
10

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HLSC1F90
March24th,2016
HealthyPlanet
People,theenvironmentandhealth
Humanhealthisfundamentallyrelatedtothehealthofourplanet
humanscanbecomeill,ordiefrom
ingestingpollutedwater,foodordust
inhalingcontaminatedair
comingintocontactwithpollutedwater,soil,objects
contaminationcancomefrom:
industrializedagricultural&manufacturingprocesses
relianceonfossilfuelsforpoweringmachinery&vehicles,heating,etc
poorwastemanagementpractices(coupledwithexcessivepackaging
andpoorsanitation)
Overpopulation
oct.2011:globalpopulationreached7billion
1→2bllion…123years
6→7billion…12years
2050:9.2billion
2083:10billion
growthisduetofertility&lifeexpectancy
althoughfertilityratesarefallingslowly,infantmortalityratesare
fallingevenfaster
fertility(developingnations):4.63now;2.5in2050
Waterpollution
waterpollutioncancomefrom2sources
pointsourcepollutantsenterawaterwayataspecificpoint(eg.
pipe,culvertetc.)
nonpointsourcepollutantsseepintothewaterfrombroadareas
ofland(e.g.chemicalrunofffromfarmers’fields,septictankleack
tobehealthy,watersourcesmustbecleaned
therefore:
beactiveinpoliticalprocessesthatregulatewater
practicegoodpersonalwatermanagement(e.g.don’tdump
householdwastes,don’toverusewater)

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thesestepsapplytodevelopedanddevelopingcountries
Landpollution
landpollutionisaserioushumanbyproductindevelopedand
developingcountries 
Developed
Developing
Regulationofwaste
Strict
lax
Amountofwaste
Higher
lower
developedcountries:managelandfill
developingcountries:create&uselandfillsites
tobehealthy,wemusthavehealthyland
therefore
beactiveinthepoliticalprocessthatregulateslanduse
reducepersonalwaste(upto90%of“garbage”inlandfillscould
bediverted)
*______isdefinedas:daytodayatmosphericconditions
Answer:weather
*_____isdefinedasthe‘averageweather’
Answer:climate
*_____isdefinedas:measurable,sustainedalterationintheusual,expected‘average
weather’
Answer:climatechange
ClimatechangeandHealth
Weather:daytodayatmosphericconditions
Climate:theaverageweather(includingallseasonalvariations)foraspecificregion
calculatedbyaveragingweatherconditionsandpatternoveralongperiodof
time(usually30years)
Climatechange:sustained
(decadeslong)departuresfromtheusualorexpected
weatherpatternsforaspecificregion
Climatechange:howdoesitoccur?
naturalprocessescontributetoclimatechange:
variationsinsunlightandsolarradiationreachingearth
volcaniceruptions
oceancurrents
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