diving deeper notes

• population concentration
• 2/3 of the world's inhabitants are clustered in four regions:
• east Asia
• south Asia
• southeast Asia
• europe
• site and situation of population clusters
• low lying areas with fertile soil and temperature climate
• near an ocean or near a river with easy access to an ocean
• sparsely populated region
• humans avoid clustering in a certain physical environment
• drylands
• wet lands
• cold lands
• high lands
• places considered too harsh for occupancy have diminished over time
• population density
• density can be computed in up to three ways for a place
• arithmetic
• total number of objects in an area
• computation: divide the population by land area
• physiological
• number of people supported by a unit area of arable land
• computation: divide the population by the arable land area
• agricultural
• a ratio of the number of farmers to amount of arable land
• computation: divide the population of farmers by the arable land area
• components of population growth
• geographers measure population change in a country or the world as a whole by using three measure
• crude birth rate (CBR)
• crude death rate (CDR)
• the rate of natural increase (RNI)