GEOG 5 Lecture Notes - Lecture 5: Lithosphere, Air Pollution, Nitrification
Document Summary
Movement of people from rural areas to densely populated cities. Approximately 79% of people in us live in cities. Urban occupations are not connected directly with natural resources. Because development is spread out in suburbs, having an automobile is a necessity to accomplish chores. High density of commercial enterprises in urban areas causes buildup of airborne emissions. Cities affect water flow because rainfall-absorbing soil is paved and built on. Contributes to air pollution, water pollution, environmental and health problems. Urban areas in developing nations have the worth air pollution in the world. Well planned cities reduce pollution and preserve rural areas. Compact development: cities in which tall, multiple-unit residential buildings are close to shopping, jobs, and public transportation (i. e. , portland, oregon) More people walk, cycle or take public transportation. 51% of world"s population lives in urban areas. 400 cities have more than 1 million people. 75% of the population in highly developed countries are urban.
