Ch 14 How we use Land

Active Reading Workbook, pages 71-72

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.

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:

How do humans use land? Pg 381• Food and Supplies:

• Rangeland—%• Cropland—%• Forests—%

• Place to live:• Urban land—%

• Pleasure:• Parks and Preserves--%

When did urbanization occur? Why? Pg 9-11, 382

• Hunter/gatherers:

• Agricultural revolution:

• Industrial revolution:

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?– – –

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

Ch 14.1 How we use land

• Quick Quiz 14.1– By yourself—without your neighbor—complete

this quiz and turn it in.

Ch 14.2 Urban Land Use

• Active Reading Workbook, pgs 73-74

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.

Ch 14.2 Urban Land Use pg 384

• Urbanization?

People move to the cities for

Some metropolitan areas are

Ch 14.2 Urban Land Use p385

• Infrastructure:

• Examples:

• Urban Crisis:

• Urban sprawl:

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.

Ch 14.3 Land Management

• Active Reading Workbook pgs 75-76

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.

Ch 14.3 Land Management p 389

• What is farmland?

• In the U.S. ____________________ is available.

• Farmland is threatened by

Ch 14.3 Land Management p 390

• Rangeland:

• World population growth will require a ________ ___________ in food production from 1977 to __________.

• Problems:

• Solutions:

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____.

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

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

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

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.