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Chapter 1: Environmental Problems, Causes and Sustainability PowerPoint PPT Presentation


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Chapter 1: Environmental Problems, Causes and Sustainability. Key Concepts. What is Environmental Science?. Growth and Sustainability. Resources and Resource Use. Pollution. What are the root Causes of Environmental Problems. * Environment :.

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Chapter 1: Environmental Problems, Causes and Sustainability

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Chapter 1 environmental problems causes and sustainability

Chapter 1: Environmental Problems, Causes and Sustainability


Key concepts

Key Concepts

  • What is Environmental Science?

  • Growth and Sustainability

  • Resources and Resource Use

  • Pollution

  • What are the root

    Causes of Environmental Problems


Environment

*Environment:

  • Everything that surrounds and affects an organism

  • The natural world as well as the things produced


Chapter 1 environmental problems causes and sustainability

I. ENVIRONMENTAL STUDIES:

Interdisciplinary Science that…

1.) Help us understand how the earth works

2.) Learn how we are affecting the earth’s life support systems

3.) Propose and evaluate solutions to the environmental problems we face.


Major groups concerned with environmental issues see page 3 in textbook

MAJOR GROUPS CONCERNED WITH ENVIRONMENTAL ISSUES (see page 3 in textbook)

1.) ECOLOGIST

2.) ENVIRONMENTAL SCIENTIST

3.) CONSERVATION BIOLOGIST

4.) ENVIRONMENTALIST

5.) PRESERVATIONIST

6.) CONSERVATIONIST

7.) RESTORAIONIST


Consensus science

Consensus Science

  • Suggests that issues such as global climate change, deforestation, and species loss SHOULD be taken as a serious problem.


Ii environmental problems

II. ENVIRONMENTAL PROBLEMS

A. Three categories:

1) NATURAL RESOURCE DEPLETION

2) POLLUTION

3) EXTINCTION


1 resource depletion

1. RESOURCE DEPLETION

  • DEPLETION:

  • A large part of these resources has been used.

    - Natural resources:

    (sunlight, air ,water, soil, plants, minerals, animals, fossil fuels, etc)

  • Two categories:

    RENEWABLEandNON-RENEWABLE


Chapter 1 environmental problems causes and sustainability

RENEWABLE –

resources that can be continually replaced

NON-RENEWABLE –

resources that cannot be replaced


Chapter 1 environmental problems causes and sustainability

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Environmentally sustainable society

ENVIRONMENTALLY SUSTAINABLE SOCIETY

Satisfies the basic needs for…

food, water, air, and shelter

  • Resources that can be used in the indefinite future without being depleted

  • Does not prevent future generations from meeting these needs


Chapter 1 environmental problems causes and sustainability

2. POLLUTION

-A poisoning, intentional or not, of our air, water, or soil.


Pollution sources

Pollution Sources

  • Point Sources- where pollutants come from single identifiable sources. Ex: exhaust pipe of an automobile.

  • Nonpoint sources- come from dispersed sources often hard to identify. Ex: runoff of fertilizer from farmlands, golf courses, and lawns.


3 extinction

3. EXTINCTION

Condition where a species completely disappears from the earth

*Most species are becoming extinct due to habitat loss

Do Do Bird

Passenger Pigeon

Mammoth

Giant Ground Sloth


Chapter 1 environmental problems causes and sustainability

  • Biodiversity Depletion

  • Habitat destruction

  • Habitat degradation

  • Extinction

  • Air Pollution

  • Global climate change

  • Stratospheric ozone depletion

  • Urban air pollution

  • Acid deposition

  • Outdoor pollutants

  • Indoor pollutants

  • Noise

  • Food Supply Problems

  • Overgrazing

  • Farmland loss

  • and degradation

  • Wetlands loss

  • and degradation

  • Overfishing

  • Coastal pollution

  • Soil erosion

  • Soil salinization

  • Soil waterlogging

  • Water shortages

  • Groundwater depletion

  • Loss of biodiversity

  • Poor nutrition

Major

Environmental

Problems

  • Water Pollution

  • Sediment

  • Nutrient overload

  • Toxic chemicals

  • Infectious agents

  • Oxygen depletion

  • Pesticides

  • Oil spills

  • Excess heat

  • Waste Production

  • Solid waste

  • Hazardous waste


Iii root of environmental problems

III. ROOT OF ENVIRONMENTAL PROBLEMS

Almost all environmental problems can be traced back to…

1)POPULATION CRISIS-

Number of people grows too quickly for the earth to support.

2)CONSUMPTION CRISIS-

People are using up, polluting, wasting things faster than can be replaced.


Population growth

Fig. 1-2 p. 4

Fig. 1-3 p. 5

Population Growth

  • Linear Growth

  • ExponentialGrowth-starts slow then becomes very rapid

  • Doubling Time/Rule of 70

* The current world population for mid-year 2007 is estimated at 6,602,224,175


World population

16

15

?

14

13

12

11

?

10

9

Billions of people

8

?

7

6

5

4

3

2

Black Death–the Plague

1

0

2-5 million

years

8000

6000

4000

2000

2000

2100

B.C.

A.D.

Time

Hunting and

gathering

Agricultural revolution

Industrial

revolution

World Population

Fig. 1.1, p. 2


Actual word population trend

ACTUAL WORD POPULATION TREND

United States Birth rate: 14.14 births/1,000 population (2003 est.) 2.07 children born/woman (2003 est.)

http://www.otherwise.com/population/exponent.html


A global perspective

A Global Perspective:

  • Many environmental problems affect the entire world...

  • Examples:

  • Pollution in the American Midwest falls on Canada as acid rain

  • Destruction of tropical rainforests increases CO2 worldwide


Ecological footprint

Per Captia Ecological Footprint

(Hectares of land per person)

Country

10.9

United States

5.9

The Netherlands

1.0

India

Total Ecological Footprint

(Hectares)

Country

3 billion

hectares

United States

94 million hectares

The Netherlands

1 billion

hectares

India

Ecological Footprint

1 Hectare = 2.5 Acres

Fig. 1.10, p. 11


Ecological footprint links

ECOLOGICAL FOOTPRINT LINKS


Chapter 1 environmental problems causes and sustainability

ENVIRONMENTALLY SUSTAINABLE ECONOMIC DEVELOPMENT

-Use of economic rewards and incentives

-Increased economic penalties

-Shift to prevention vs. excess


Sustainable development

Sustainable Development

Chapter 1: videos – Play on Windows Media Player


Story of change season 2

Story of Change(Season 2)


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