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Environmental Science

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Title: Understanding Our Environment Author: CCSN Last modified by: Howard County Administrator Created Date: 8/30/2014 6:33:49 PM Document presentation format – PowerPoint PPT presentation

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Title: Environmental Science


1
Environmental Science
2
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3
The Goals of Environmental Science
  • How nature works.
  • How the environment effects us.
  • How we effect the environment.
  • How we can live more sustainably without
    degrading our life-support system.

4
Human Population
  • The human race plays a key role in important
    issues we will be discussing the whole year
  • Population growth
  • Poverty
  • Loss of biological diversity
  • Pollution
  • Global climate change
  • Resource use

5
The Population Dilemma exponential growth
?
Billions of people
Black Deaththe Plague
Time
Industrial Revolution
Hunting and Gathering
Agricultural revolution
Fig. 1-1, p. 6
6
Poverty
  • 50 of people still trying to survive off lt
    3/day
  • deplete and degrade environment

Wealth is becoming increasingly concentrated
7
Loss of Biological Diversity
  • Premature extinction of species
  • Why is losing biodiversity so critical?

8
Pollution
  • Pollution-
  • Natural occurrences
  • Biogenic
  • Human activities
  • Anthropogenic

9
Pollution
  • Occurs more in urban areas
  • Can contaminate area where produced or be carried
    away by wind or water
  • Factors that determine the damage a pollutant can
    cause
  • Concentration
  • Persistence
  • Chemical nature
  • Rate of degradation

10
Climate Change
  • Population growth, resource use, poverty, and
    loss of biological diversity contribute to
    climate change
  • Global warming

11
What the Earth Provides Us Natural Capital
  • Natural capital- Earths resources and ecological
    services
  • Air
  • Water
  • Soil
  • Forests
  • Fishery
  • Minerals
  • Natural water and air purification

12
NATURAL RESOURCE SERVICES

NATURAL CAPITAL

NATURAL RESOURCES
NATURAL SERVICES
SERVICES
RESOURCES
Air purification
Air
Water purification
Water
Water storage
Soil renewal
Soil
Nutrient recycling
Land
Food production
CAPITAL

Conservation of biodiversity
Life (Biodiversity)

Wildlife habitat
Nonrenewable minerals (iron, sand)
Grassland and forest renewal
Waste treatment
Renewable energy sun, wind, water flows
Climate control
Population control (species interactions
Nonrenewable energy (fossil fuels, nuclear power)
Pest Control
Fig. 1-4, p. 9
13
Environmental and Resource Problems The Big Five
Causes
  • Major causes of problems
  • 1. Population growth
  • 2. Wasteful resource use
  • 3. Poverty
  • 4. Poor environmental
  • accounting
  • 5. Ecological and
  • environmental ignorance

14
Easter Island
15
Sustainability The Integrative Theme
A Path to Sustainability
Individuals Matter
Natural Capital Degradation
Trade-Offs
Natural Capital
Solutions
Sound Science
Living sustainably - satisfying peoples needs of
the present, without depleting natural resources
to meet the needs of future generations
Fig. 1-3, p. 8
16
Shifts needed to bring about
sustainable revolution
Fig. 1-18, p. 25
17
Is Our Present Course Sustainable? Guidelines for
the Earth
  • Never leave it worse than you found it
  • Take only what you need
  • Sustain diverse living organisms
  • Maintains Earths capacity for self-repair
  • Decrease waste
  • Decrease pollution
  • Decrease population

18
Ecological Footprint
  • A measure of human demand on earths ecosystems
  • Looks at consumption of
  • Energy
  • Food
  • Building material
  • Water
  • Other resources

19
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20
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21
Your Ecological and Water Footprint?
  • Go to http//www.earthday.org/footprint-calculator
    and complete the Ecological Footprint Quiz
  • Go to http//environment.nationalgeographic.com/en
    vironment/freshwater/change-the-course/water-footp
    rint-calculator/ and complete the Water Footprint
    Quiz
  • Copy and paste results from the above two
    footprints in to one email and sent to
    cheryl_rice_at_hcpss.org
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