ch 14 how we use land active reading workbook, pages 71-72
TRANSCRIPT
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Ch 14 How we use Land
Active Reading Workbook, pages 71-72
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Environmental Science 3/21
Learning objectives:1. I will be able to tell the difference between
urban and rural land and give examples.2. I will be able to describe 3 major ways
humans use land.3. I will be able to explain the concept of
ecosystem services and how the U.S. compares with other countries.
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Ch 14.1 How we use land pg 381
• Urban– over 50,000• Examples:• Suburban—10,000 – 50,000• Examples:• Rural–less than 10,000• Examples:
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How do humans use land? Pg 381• Food and Supplies:
• Rangeland—%• Cropland—%• Forests—%
• Place to live:• Urban land—%
• Pleasure:• Parks and Preserves--%
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When did urbanization occur? Why? Pg 9-11, 382
• Hunter/gatherers:
• Agricultural revolution:
• Industrial revolution:
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What are ecosystem services? Pg 383• Ecosystem services:
• How much rural land is needed to support each person in the United States? In Germany? In least developed countries?
• What factors determine the area of resources needed?– – –
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Learning objectives revisited…
1. I will be able to tell the difference between urban and rural land and give examples.
2. I will be able to describe 3 major ways humans use land.
3. I will be able to explain the concept of ecosystem services and how the U.S. compares with other countries
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Ch 14.1 How we use land
• Quick Quiz 14.1– By yourself—without your neighbor—complete
this quiz and turn it in.
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Ch 14.2 Urban Land Use
• Active Reading Workbook, pgs 73-74
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Ch 14.2 Urban Land Use pg 384
1. I will be able to explain how urban sprawl affects the environment and give examples.
2. I will be able to explain the heat island effect and give examples.
3. I will be able to explain how urban planning deals with transportation and open space.
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Ch 14.2 Urban Land Use pg 384
• Urbanization?
People move to the cities for
Some metropolitan areas are
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Ch 14.2 Urban Land Use p385
• Infrastructure:
• Examples:
• Urban Crisis:
• Urban sprawl:
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Ch 14.2 Urban Land Use Learning objectives revisited
1. I will be able to explain how urban sprawl affects the environment and give examples.
2. I will be able to explain the heat island effect and give examples.
3. I will be able to explain how urban planning deals with transportation and open space.
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Ch 14.3 Land Management
• Active Reading Workbook pgs 75-76
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Ch 14.3 Land Management p 389
1. I will be able to explain why it is necessary to preserve farmland.
2. I will be able to describe how rangeland should be managed to be sustainable.
3. I will be able to describe the types of tree cutting methods and how they impact the environment.
4. I will be able to describe the steps taken to protect parks and preserves and why.
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Ch 14.3 Land Management p 389
• What is farmland?
• In the U.S. ____________________ is available.
• Farmland is threatened by
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Ch 14.3 Land Management p 390
• Rangeland:
• World population growth will require a ________ ___________ in food production from 1977 to __________.
• Problems:
• Solutions:
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Ch 14.3 Land Management pg 391
• Forest Lands: harvest trees• The most important ecosystem service of the
forest is _removal of CO2__.• Harvesting trees: world wide average
_1800cm3________• U.S. average _6300cm3______________• In developing countries _1.5______billion people
use _fuelwood for _heating and __cooking____.
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Ch 14.3 Land Management p 391
• 2 methods of harvesting trees:1. Clear cutting: cutting all trees
Effects on environment: erosion, loss of habitat,
2. Selective cutting: cutting only mature trees
Effects on environment: less devastating than clear cutting; more expensive
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Ch 14.3 Land Management p 392-393• Deforestation: removal of all the trees in an area
• Effects on environment: loss of habitat, soil erosion
• The rate of deforestation is highest in the ___tropical rain forest____
• Reforestation : replanting all the trees• Government actions: require timber companies to
plant trees back after cutting
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Ch 14.3 Land Management pg 395• Parks and Preserves: places for recreation, preserving wildlife• Biosphere reserves: large areas around the world that are
protected• US Wilderness Act: 1964 designates land as wilderness
areas. YELLOWSTONE, WYOMING & MONTANA• Humans use wilderness areas for hiking, camping, fishing, • Benefits:
1. Preserve wildlife habitats 2. Recreation3. Education
• Threats1. pollution 2. climate change
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Ch 14.3 Land Management Learning objectives revisited
1. I will be able to explain why it is necessary to preserve farmland.
2. I will be able to describe how rangeland should be managed to be sustainable.
3. I will be able to describe the types of tree cutting methods and how they impact the environment.
4. I will be able to describe the steps taken to protect parks and preserves and why.