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CA (167,254)
UTSC (19,212)
EESA01H3 (82)
Chapter 1

Chapter 1 GREAT DETAILED NOTES

18 Pages
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Department
Environmental Science
Course Code
EESA01H3
Professor
Carl Mitchell

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Our environment is more then just our surroundings
Environment is the sum of our surroundings
It includes all of earths
oBiotic Components (Living Things)
Biotic Constituents = Animals, plants, soil, forests, people occupying
landscape
oAbiotic Components (Nonliving things)
Abiotic Constituents = Continents, oceans, clouds, rivers, icecaps
In the most inclusive scene, our environment includes scientific, political, ethical,
economical, and social relationships & institutions.
It is the interactions that characterize environment.
Most people equated environment with wilderness.
Environment Canada is to preserve and enhance the quality of Canadas natural
environment, conserve our renewable resources and protect our water resources.
Environmental science explores interactions between humans and the physical
and biological world
We depend on the environment for air, water, food, shelter, and everything else
essential for living.
Some actions have enriched our lives, bringing us longer life spans, better health
oSome have damaged natural systems that sustain us
Water & air pollution, soil erosion etc.
Environmental Science is the study of how the natural world works, how our
environment affects us, and how we affect our environment.
oIt is important to understand our interactions and our role in the
environment.
Natural resources are vital to our survival
Islands are finite and have limitation in material resources
www.notesolution.com
Renewable Natural Resources are natural resources that are relenishable over
short periods (wind, wave energy, sunlight.
oBecome non-renewable if we use them at a rate that is faster at which they
are renewed or replenished.
Resource Management is a strategic decision making and planning aimed at
balancing the use of a resource with its protection and preservation.
oBalance the withdrawal from the stock with the rate of renewal/regeneration
oStock is the harvestable portion of the resource
Stock-and-flow resources highlight the importance of the balance
Non-Renewable Natural Resources are finite supply & depletable as they are
formed much more slowly (fossil fuels, mineral deposits.)
oOnce we use them up they are no longer available.
oFossil fuels & minerals are mined rather than harvested, therore once
extraction becomes inefficient to be profitable they move on to new sites.
Management of non-renewable mineral resources demands
conservation, reuse & recycling.
oOther resources are truly non-renewable and nonreplenishable (once a species
has become extinct it wont return)
oA key question in managing resources is to look at the resource of interest or
to look at the environmental system and how to avoid damaging the system
and sustain the availability of the resource in the long term.
Important to preserve for the future, recently the consumption of
natural resources has increased greatly.
Human population growth has shaped our resource use
Four significant periods of societal change appear to have triggered remarkable
increases in population size.
o1. The paleolithic (stone age) period > humans gained control of fire and
began to shape and use stones to modify their environment
www.notesolution.com
o2. Neolithic Period (agricultural revolution) Transition from a nomadic,
hunter-gatherer lifestyle to a settled, agricultural way of life. This change was
10000-12000 years ago.
o3. Industrial Revolution began in mid-1700s, entailed a shift from rural
life, and manufacturing by crafts people, to an urban society powered by fossil
fuels. Life improved, but marked the beginning of industrial-scale pollution
air quality declined as of reliance on coal.
Water quantity declined
Workplace health and safety went under dramatic decline
o4. Medical-Technological Revolution Advances in medicine and
sanitation, communication technologies, shift to modern agricultural
practices (green revolution) allowed people to live longer healthier lives.
Each major transition introduced technological advancements that made life easier
and resources more available, effectively increasing the carrying capacity of the
environment for humans and allowing the human population to increase
dramatically.
Resource consumption exerts social and environmental impacts
Population growth affects resource use and availability > at the root of many
environmental problems
I = P x A x T
This IPAT model shows that the impact is a function of not only population but of affluence
(which stands in for level of consumption) . Increase in number of people (P) has impacts on
increased consumption of natural resources and manufactured goods by the worlds people
(A), and the impacts of new technologies (T) on the environment.
Carrying capacity and the tragedy of the commons
Carrying capacity refers to the biological productivity of a system; it is a measure
of the ability of a system to support life.
oEnvironmental scientists quantify carrying capacity in terms of the number
of individuals of a particular species that can be sustained by the biological
productivity of a given area of land.
www.notesolution.com

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Description
Our environment is more then just our surroundings Environment is the sum of our surroundings It includes all of earths o Biotic Components (Living Things) Biotic Constituents = Animals, plants, soil, forests, people occupying landscape o Abiotic Components (Nonliving things) Abiotic Constituents = Continents, oceans, clouds, rivers, icecaps In the most inclusive scene, our environment includes scientific, political, ethical, economical, and social relationships & institutions. It is the interactions that characterize environment. Most people equated environment with wilderness. Environment Canada is to preserve and enhance the quality of Canadas natural environment, conserve our renewable resources and protect our water resources. Environmental science explores interactions between humans and the physical and biological world We depend on the environment for air, water, food, shelter, and everything else essential for living. Some actions have enriched our lives, bringing us longer life spans, better health o Some have damaged natural systems that sustain us Water & air pollution, soil erosion etc. Environmental Science is the study of how the natural world works, how our environment affects us, and how we affect our environment. o It is important to understand our interactions and our role in the environment. Natural resources are vital to our survival Islands are finite and have limitation in material resources www.notesolution.com Renewable Natural Resources are natural resources that are relenishable over short periods (wind, wave energy, sunlight. o Become non-renewable if we use them at a rate that is faster at which they are renewed or replenished. Resource Management is a strategic decision making and planning aimed at balancing the use of a resource with its protection and preservation. o Balance the withdrawal from the stock with the rate of renewalregeneration o Stock is the harvestable portion of the resource Stock-and-flow resources highlight the importance of the balance Non-Renewable Natural Resources are finite supply & depletable as they are formed much more slowly (fossil fuels, mineral deposits.) o Once we use them up they are no longer available. o Fossil fuels & minerals are mined rather than harvested, therore once extraction becomes inefficient to be profitable they move on to new sites. Management of non-renewable mineral resources demands conservation, reuse & recycling. o Other resources are truly non-renewable and nonreplenishable (once a species has become extinct it wont return) o A key question in managing resources is to look at the resource of interest or to look at the environmental system and how to avoid damaging the system and sustain the availability of the resource in the long term. Important to preserve for the future, recently the consumption of natural resources has increased greatly. Human population growth has shaped our resource use Four significant periods of societal change appear to have triggered remarkable increases in population size. o 1. The paleolithic (stone age) period > humans gained control of fire and began to shape and use stones to modify their environment www.notesolution.com
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