1 2 ecological footprint
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Transcript of 1 2 ecological footprint
1-2 How Are Our 1-2 How Are Our Ecological Ecological Footprints Footprints
Affecting the EarthAffecting the Earth
By Mr. “pizza mmmm” ChapmanBy Mr. “pizza mmmm” Chapman
Voc WordsVoc Words
PerpetualPerpetual resourceresource – renewed continuously (Solar energy) – renewed continuously (Solar energy) Renewable resourceRenewable resource – days to centuries (water, air, – days to centuries (water, air,
forests, forests, soilsoil, fish populations), fish populations) NonrenewableNonrenewable – fixed quantities (fossil fuels, metals, – fixed quantities (fossil fuels, metals,
minerals)minerals) Environmental degradation Environmental degradation - - exceeds natural replacement exceeds natural replacement
rate.rate.
As our ecological footprints grow, we deplete and As our ecological footprints grow, we deplete and degrade more of the earth’s natural capital.degrade more of the earth’s natural capital.
Fig. 1-4, p. 10
Ecological FootprintEcological Footprint Ecological footprintEcological footprint
The amount of land and water needed to supply The amount of land and water needed to supply people in a given area with renewable resources people in a given area with renewable resources forever.forever.
Also includes the land and water necessary to Also includes the land and water necessary to absorb and recycle wastes and pollutionabsorb and recycle wastes and pollution
Ecological FootprintEcological Footprint Per capita ecological footprintPer capita ecological footprint Average ecological footprint of an Average ecological footprint of an
individual in a given area (takes into individual in a given area (takes into account number of people)account number of people)
China – large ecological footprint because so China – large ecological footprint because so many people many people
China – small per capita footprint each person China – small per capita footprint each person only contributes a littleonly contributes a little
Fig. 1-5, p. 11
Stepped Art
Ecological FootprintEcological Footprint
Ecological deficitEcological deficit Total ecological footprint greater than what Total ecological footprint greater than what
the earth can supportthe earth can support 2008 study: at least 30% global excess2008 study: at least 30% global excess Humans currently need 1.3 earths Humans currently need 1.3 earths 88% for high-income countries88% for high-income countries Need 6 earths if everyone lived like Need 6 earths if everyone lived like
AmericansAmericans
Fig. 1-7, p. 13
Environmentalimpact of population
(I)
Developing Countries
Population (P)
Developed Countries
Consumptionper person
(affluence, A)
Technological impact per unit of
consumption (T)
Developed Countries Developed Countries Have Higher ImpactsHave Higher Impacts Developed countries (1Developed countries (1stst world) world)
United States, Japan, New Zealand, United States, Japan, New Zealand, most of Europe, some othersmost of Europe, some others
19% world population19% world population Use 88% of world’s resourcesUse 88% of world’s resources Create 75% of world’s pollutionCreate 75% of world’s pollution
Developing CountriesDeveloping Countries (2 (2ndnd World)World)
81% world population81% world population Middle income: Brazil, China, IndiaMiddle income: Brazil, China, India
Least Developed Least Developed (3(3rdrd world)world) Countries: Haiti, Nigeria, NicaraguaCountries: Haiti, Nigeria, Nicaragua Use far fewer resources per capita (per Use far fewer resources per capita (per
person) than developed countriesperson) than developed countries Smaller per capita ecological footprintSmaller per capita ecological footprint
Tragedy of the CommonsTragedy of the Commons
Environmental degradation of openly Environmental degradation of openly shared renewable resourcesshared renewable resources
Users focus on their own selfish, short-Users focus on their own selfish, short-term gainterm gain
Works when only a small number of Works when only a small number of usersusers
Big part of why humans now live Big part of why humans now live unsustainablyunsustainably