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Environmental ProblemsEnvironmental Problems
Patten & ValdnerGlobal History II
Mepham High School
Patten & ValdnerGlobal History II
Mepham High School
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PollutionPollution
Pollution is the contamination of the environment (air, water, & soil) which is harmful to humans, plants and other animal life.
Pollution is the contamination of the environment (air, water, & soil) which is harmful to humans, plants and other animal life.
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Results of PollutionResults of Pollution
Acid Rain: Rain falls through air polluted by burning fossil fuels.
Fossil Fuels: Coal, oil, and natural gasDamage caused by acid rain effects
damages forests, lakes and farmlandSolutions: International agreements
to reduce emissions of substances that cause acid rain
Acid Rain: Rain falls through air polluted by burning fossil fuels.
Fossil Fuels: Coal, oil, and natural gasDamage caused by acid rain effects
damages forests, lakes and farmlandSolutions: International agreements
to reduce emissions of substances that cause acid rain
Depletion of the Ozone Layer
Depletion of the Ozone Layer
The ozone layer is a layer of gases in the atmosphere that protects the Earth from sun’s dangerous ultra violet rays
The ozone layer is depleting because of the chloroflurocarbons and chemical pollutants
The ozone layer is a layer of gases in the atmosphere that protects the Earth from sun’s dangerous ultra violet rays
The ozone layer is depleting because of the chloroflurocarbons and chemical pollutants
Effects of DepletionEffects of Depletion
Effects:Exposes people to
solar radiation which results in skin cancer and eye disease
Damages crops and marine life
Effects:Exposes people to
solar radiation which results in skin cancer and eye disease
Damages crops and marine life
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Global WarmingGlobal Warming
Global warming is the gradual rise in the global temperatures because warm air is trapped in the lower atmosphere
Global warming is the gradual rise in the global temperatures because warm air is trapped in the lower atmosphere
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Causes and SolutionsCauses and Solutions
Caused of Global Warming: Use of CFCs, burning
of fossil fuel and the destruction of forests
Solutions: UN summit (1997) set
limits on emissions thought to contribute to global warming
Caused of Global Warming: Use of CFCs, burning
of fossil fuel and the destruction of forests
Solutions: UN summit (1997) set
limits on emissions thought to contribute to global warming
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DesertificationDesertification
Desertification is the change of the land form arable (able to be farmed) to desert because of human activity
Desertification is the change of the land form arable (able to be farmed) to desert because of human activity
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Cause of DesertificationCause of Desertification
Overgrazing by live-stock
Cutting down forests
Overgrazing by live-stock
Cutting down forests
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Effects of DesertificationEffects of Desertification
Eliminates grasses that hold the soil together to prevent erosion
Robs the land of a barrier to soil erosion
Wind erosion removes fertile topsoil so the land cannot support plant life
Loss of farmsDecrease food production
Eliminates grasses that hold the soil together to prevent erosion
Robs the land of a barrier to soil erosion
Wind erosion removes fertile topsoil so the land cannot support plant life
Loss of farmsDecrease food production
Controlling DesertificationControlling Desertification
Restricting livestockPlanting new treesIn developing countries, farmers
want to work as much land as possible, but……
Teaching new farming methods such as improved irrigation may help
Restricting livestockPlanting new treesIn developing countries, farmers
want to work as much land as possible, but……
Teaching new farming methods such as improved irrigation may help
Nuclear SafetyNuclear Safety
Explain the incident at Chernobyl:Accident in Chernobyl nuclear plant
exposed people and crops to radiationRadiation was blown across Europe
Result:Heightened concern about safe
nuclear energy; some countries increased safety practices, some cut back nuclear programs
Explain the incident at Chernobyl:Accident in Chernobyl nuclear plant
exposed people and crops to radiationRadiation was blown across Europe
Result:Heightened concern about safe
nuclear energy; some countries increased safety practices, some cut back nuclear programs
Why is nuclear waste a problem?
Why is nuclear waste a problem?
Radioactivity remains for many years
Exposure is harmful to humans
Dumping nuclear waste at sea or in wells contaminate locality
Radioactivity remains for many years
Exposure is harmful to humans
Dumping nuclear waste at sea or in wells contaminate locality
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Global SolutionsGlobal Solutions
Dumping of waste at sea and in wells has been banned
Nations are seeking safe methods of disposal
Dumping of waste at sea and in wells has been banned
Nations are seeking safe methods of disposal
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DeforestationDeforestation
Deforestation is the destruction of forests, especially rain forests
Deforestation is the destruction of forests, especially rain forests
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Causes of DeforestationCauses of Deforestation
Caused by harvesting of lumber or cleaning f land to grow crops, graze animals or build homes
50 million acres of tropical forest are lost each year
Caused by harvesting of lumber or cleaning f land to grow crops, graze animals or build homes
50 million acres of tropical forest are lost each year
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Effects of DeforestationEffects of Deforestation
Changes in local weather patternsBuildup of carbon dioxide in the
atmosphere (leading to green house effect)
Soil erosionExtinction of certain plants and
animals
Changes in local weather patternsBuildup of carbon dioxide in the
atmosphere (leading to green house effect)
Soil erosionExtinction of certain plants and
animals
Global SolutionsGlobal Solutions
To balance economic needs of developing nations with needs of global population
International debates and discussions such and the United Nations Earth Summit in 1992
To balance economic needs of developing nations with needs of global population
International debates and discussions such and the United Nations Earth Summit in 1992
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Endangered Species Endangered Species
Caused be deforestation, clearing of land, damming of waterways and pollution
These human activities threaten to wipe out species of plants and animals
Caused be deforestation, clearing of land, damming of waterways and pollution
These human activities threaten to wipe out species of plants and animals
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Effects of Endangered Species
Effects of Endangered Species
Damages balance of ecosystem
Disappearance of resources for food and medicine
Damages balance of ecosystem
Disappearance of resources for food and medicine
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Global SolutionsGlobal Solutions
International agreements to ban certain practices (such as shipment and sale of endangered animals)
Preserving plant and animal habitats
International debates and discussions such as the UN’s Earth Summit
International agreements to ban certain practices (such as shipment and sale of endangered animals)
Preserving plant and animal habitats
International debates and discussions such as the UN’s Earth Summit
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