Presentation on theme: "Chapter 14. Objectives 1.Distinguish between urban and rural land. 2.Describe three major ways in which humans use land. 3.Explain the concept of ecosystem."— Presentation transcript:
Supporting urban areas depends on the following: Climate Standard of living Now efficient resources are used
Objectives 1.Describe the urban crisis, and explain what people are doing to deal with it. 2.Explain how urban sprawl affects the environment. 3.Explain how open spaces provide urban areas with environmental benefits. 4.Explain the heat-island effect. 5.Describe how people use the geographic information system as a tool for land-use planning.
Urbanization Movement of people into rural areas 1960 - 70% 1980 – 75% Why move out of rural areas???
The Urban Crisis What problems are caused by a city that grows too quickly?? Infrastructure – all the things that a society builds for public use (roads, sewer, hospitals, fire & police, power lines, etc)
Urban sprawl Expansion of city into the countryside
Transportation considerations Mass transit Need for open space (green spaces)
Objectives 1. Explain the benefits of preserving farmland 2. Describe two ways that rangeland can be managed sustainability 3. Describe the environmental effects of deforestation 4. Explain the function of parks and wilderness area
Farmland Land that is used to grow crops or fruit US has over 100 million hectares 1 hectare=10,000 square meters or around 108,000 feet Development threats farmland Establishment of Farmland Protection Agency
Rangelands Grasslands, shrublands, and deserts not used for farming Can be arid or wet Mostly used for livestock Problems on rangeland - overgrazing changes plant community - maintenance Public Rangelands Improvement Act of 1978
Deforestation Clearing of trees form an area without replacement Reduces wildlife habitat Soil erosion Reforestation The process by which trees are planted to re-establish trees that have been cut down
Parks and Preserves The first national park, Yellowstone, created in 1870s We currently have over 50 national parks Purposes Hunting and fishing Wildlife refuges Logging Mining Wildness areas An area in which the land and the ecosystems it supports are protected from exploitation 13 million hectares Hiking, boating (no motors), fishing