do now – quick write what signs of growth do you see in your community? write a paragraph telling...
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Do Now – Quick WriteWhat signs of growth do you see in your
community? Write a paragraph telling how this growth might affect local ecosystems and resources.
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Homework and AnnouncementsDue Today
Reading Notes chapter 6Finish Endangered Species presentations
HomeworkStudy for Chapter 5 & 6 ExamUSA TestPrepSummary Mindmap
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Title: ResourcesL.O. SWBAT evaluate environmental impacts resulting from renewable and nonrenewable resources.
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Brain Pop
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Industrial GrowthWe have a lot of
conveniences now that allow us comfy homes, clothes and electronic devices… but these all require energy to produce and power! We get most of this
energy from fossil fuels (coal, oil and natural gas)
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Sustainable DevelopmentMost ecosystems provide us
with “goods and services” like water and air
If it can’t, then we must spend money in order to produce themIf the water isn’t being
cleaned by the natural rivers and wetlands, we have to pay for chemicals and mechanics to make it safe to drink
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Sustainable DevelopmentRenewable resource:
can be produced or replaced by a healthy ecosystemEx: Water, wind,
organisms
Nonrenewable resource: can’t replenish them within a reasonable amount of timeEx: Fossil fuels like
coal, oil and natural gas
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Sustainable DevelopmentSustainable
development: using resources in an environmentally conscious and friendly way. Provides for human
needs while preserving the ecosystem that produces those natural resources
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Sustainable DevelopmentIt should:
Cause no long-term harm to the ecosystemConsume as little energy and material as
possibleShould be able to withstand environmental
stresses (droughts, floods, heat waves, cold snaps)
Help people improve their situation
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Population and the Planet
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Using Resources WiselyHow do we obtain what we need from our
local and global environments without destroying those environments?Not farming is not an option, we all need to eat
and depend on things like wheat in many ways!
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Soil ResourcesHealthy soil supports both agriculture and
forestryYour cereal this morning and the paper of your
textbook both depend on soil
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Soil ResourcesTopsoil: the mineral
and nutrient rich portion of soilRich in organic
matter and nutrientsAllows water to drainProduced by long-
term interactions between plants
Can be renewable if managed correctly
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Soil ResourcesIf not managed correctly, topsoil can be
depleted and we lose our farming groundsThe great “Dust Bowl” in the 1930’s – long
drought and bad farming led to a loss of many jobs and fertile land
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Soil ErosionSoil erosion: the removal
of soil by water or windSoil erosion is common
when land is plowed and left barren – all organic materials are carried away
Desertification: when dry climates, farming, and overgrazing cause a farmland to turn into a desert.Happened to the Great
Plains in the “Dust Bowl”
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Soil ErosionDeforestation: the loss of
forestsAlso has an effect on soil
quality because forests hold the soil in place, protect the quality of the water, absorb carbon dioxide and help the climate.
Some areas can re-grow their forests… but remember succession (which kind??) takes years!! Other areas, like the
rainforest, can’t re-grow. Nonrenewable!
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Soil ErosionDeforestation can make matters worse if you
allow over-grazing and farming in rainforestsThe topsoil layer in rainforests is very thin, so
the organic matter is used up quickly (within a few years)
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Soil Use and SustainabilityIt is possible to minimize
soil erosion through careful management of both agriculture and forestryLeave the stems! Don’t
take everything offCrop rotation! Change the
type of crop and how often“Terrace” the land… create
steeps to help hold the soilSelectively harvest trees!
Out with the old, in with the new!
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Freshwater ResourcesRemember. Only 3% of Earth’s water is
freshwater… and most of it is frozen in the ice caps!
We must protect the ecosystems that collect and purify freshwater
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Freshwater ResourcesPollutant: any harmful material that can
enter the biospherePoint source pollution: when pollution enters
water from one sourceEx: From a factory or an oil spill
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Freshwater ResourcesNonpoint sources: when pollutants enter
water supplies from many smaller sourcesEx: the grease and oil washed off streets by
rain
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Freshwater ResourcesThe primary sources
of water pollution are:Industrial and
agricultural chemicals
Residential sewageNonpoint sources
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Industrial and Agricultural ChemicalsIndustrial pollutants are difficult to eliminate
because they stay underneath the ground, in the sand and mudEx: PCB’s – these were banned in the 1970’sEx: DDT, a pesticide and insecticide that ran off
into water supply
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Industrial and Agricultural ChemicalsBiological magnification: when a pollutant
(like DDT or mercury) is picked up by an organism and is not broken down or eliminated from its bodyConcentration increases as it goes up the food
chain
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Industrial and Agricultural ChemicalsThe concentration of DDT was so high at one
point that it threatened the existence of our national bird – the Bald Eagle
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Residential SewageWhere does the waste in your toilet go when
it flushes?Contaminates water (both fresh and salt) with
microorganisms, and depletes it of oxygen
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Water Quality and SustainabilityWatershed conservation: clean
all areas, including the areas that drop water off, to prevent pollutionSewage treatments to
eliminate bacteria and diseaseUse integrated pest
management (IPM) – natural predators to the pests instead of pesticides
Drip irrigation: delivers water drop by drop directly to the roots of the plants that need it
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Atmospheric ResourcesWe need oxygen to
breathe! But our pollution is breaking down the ozone layer, which provides us with protection from UV radiation
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Atmospheric ResourcesCommon forms of air
pollution include SmogAcid rainGreenhouse gasesParticulates
Cause respiratory illness (asthma), change climate patterns and increase skin disease
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Impacts
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Summary
How people impact resourc
es
Renewable Non-Renewable