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Human Impacts on the ENV: Global Warming, Ozone Depletion,

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... over 2 billion people live without clean water or sewers 1 billion live in cities with unsafe sulfur dioxide levels What ... regional, & local 2. – PowerPoint PPT presentation

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Title: Human Impacts on the ENV: Global Warming, Ozone Depletion,


1
Human Impacts on the ENV Global Warming, Ozone
Depletion, Acid Rain
2
A. First World Pollution
  1. people have always transformed the Earths land,
    water, air
  2. Human industrial actions the past 250 years,
    though, have accelerated the process
  3. U.S. disproportionately consumes 1/4th of worlds
    energy generates 1/4th of the pollutants

3
Industry creates a landscape, not for beauty, but
for profit and utility
4
B. Third World Issues
  • In the periphery, over 2 billion people live
    without clean water or sewers
  • 1 billion live in cities with unsafe sulfur
    dioxide levels
  • What about the growing economies of the BRIC
    countries (Brazil, Russia, India China)?

5
Industrial Landscape, Lanzhou, Chinahttp//www.h
uffingtonpost.com/2014/01/16/beijing-air-pollution
_n_4607200.html
6
  • Asian Brown Haze Over Northern India

7
C. Resource Depletion
  • Energy resources
  • Nonrenewable fossil fuels
  • petroleum, natural gas, coal
  • Mineral metal resources
  • gemstones, copper, iron,
  • bauxite, diamonds, gold
  • 3 Ts tin, tantalum, tungsten

8
D. Energy Resources
  • 1800s coal supplanted wood as leading energy
    source
  • U.S. main energy resource is coal-burning power
    plants
  • 2. Petroleum became important with diffusion of
    automobiles
  • almost all transportation systems operate on
    petroleum products
  • 3. Natural gas heats millions of homes today

9
Coal Reserves
The U.S., Russia, China, India have the largest
reserves of coal
10
Petroleum Reserves
2/3 of the worlds known petroleum reserves are
in the Middle East Saudi Arabia has over 1/4th
of world reserves
11
Natural Gas Reserves
Russia has the worlds largest natural gas
reserves. Iran other Mid-Eastern countries
have large reserves, but the U.S. has relatively
little.
12
E. Uneven Distribution of Fossil Fuels
  • The global distribution of fossil fuels
  • some regions have abundant reserves
  • Core countries consumption majority of fossil
    fuels
  • major cause of global instability in the world

13
The U.S., with about 5 of world population,
consumes about 25 of world energy.
14
F. Pollution
  • Air pollution
  • global, regional, local
  • 2. Water pollution
  • sources
  • wastewater
  • 3. Land pollution
  • solid waste
  • toxic pollutants

15
G. Air Pollution
  • concentration of particulate matter in the air
    human or natural events
  • most common air pollutants burning of fossil
    fuels like carbon monoxide, sulfur dioxide,
    nitrogen oxides, hydrocarbons
  • 3 human activities generate most air pollution
  • motor vehicles, industry, power plants

16
4. The Greenhouse Effect
  • caused by burning of fossil fuels
  • chemical composition of the air is being altered
  • leads to Global Warming

17
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18
A vast blanket of pollution being called the
"Asian Brown Haze"
19
S.E. Asia (left)E. Russia (right)
20
(No Transcript)
21
Global Temperatures, 18802000
Annual mean temperatures have increased more than
0.5 C since 1880
22
5. Ozone Depletion
  • The stratosphere contains a concentration of
    ozone gas
  • absorbs UV rays from the Sun
  • chlorofluorocarbons (CFCs) destroy ozone layer

23
6. Effects of Acid Rain
  • Industrialized, densely populated regions in
    Europe eastern U.S. are especially affected by
    acid rain
  • caused by burning fossil fuels mixing w/ oxygen
    rain
  • Acid precipitation damages lakes killing fish
    plants
  • (Over 90 lakes in Adirondack Mts. of New York
    devoid of fish life by 1980...
  • In E. Canada, 50,000 lakes impacted)

24
Effects of Acid Rain
25
Acid Deposition
Due to prevailing winds, the highest sulfate
deposit levels in North America lie east of the
emission sources. Deposit levels in Germany are
higher than in the U.S.
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