Pop. & The Environment: People & The Environment
- Created by: IssyCalderwood
- Created on: 13-03-19 10:17
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- People & The Environment
- Density
- Population divided by size of area
- Number of people per square km
- Bangladesh = 1200 people per square km
- Libya = 4 people per square km
- High pop. density = between 20 degrees north & 60 degrees north
- Highest pop. density = South and East Asia
- Varies within a country
- Population divided by size of area
- Distribution
- Pattern of where people live
- Some = favourable conditionse,g. coastal plains
- Some = unfavourable conditions e.g. glaciers
- China = unevenly distributed- 94% in eastern part, 6% in western part (mountains, desert)
- Global Population Growth
- 1804 = 1 bil
- Famine, disease, war prevented growth
- Until 1950 pop. growth limited to developed countries
- 19th Century = North America, West Europe = grew rapidly
- Improvements in meds, food = increased life expectancy & reduced infant mortality rates
- E.g. England & Wales 1801 = 9.4mil, 1901 = 32.5mil
- During same time developing countries = stable = infant & maternal mortality rates high & famine was common
- E.g. England & Wales 1801 = 9.4mil, 1901 = 32.5mil
- Improvements in meds, food = increased life expectancy & reduced infant mortality rates
- Since 1950 pop. increased rapidly - 1950 = 2.5 bil, 2017 = 7.5 bil
- Predicted 9 bil 2050
- Develoing countries increased life expectancy, decreasing death rates = Growth since 1950
- Some countries = pop. decline
- E.g. Ukraine death rate = higher than birth rate, but, global pop. still increasing
- Urban pop. increasing faster than rural
- Becoming less evenly disrtibuted- high density in cities
- 1804 = 1 bil
- How physical environment affects population
- Climate
- Few people live in dry areas e.g. Sahara desert
- Many live in temperate areas e.g. UK
- Tropical & temperate = large pop. & high pop. density because its easier to produce food
- Climate change = sea level rise = people move inland = distribution change
- Climate change also causing nutrition levels to fall in developing countries
- Soils
- Fertility determines food type & amount produced
- Determined where settlements developed & size of populations
- E.g. cities, Naples, built near volcanoes = high soil fertility
- Bangladesh = large floodplains = fertile
- Supports large scale agriculture= feeds large pop.
- Soil erosion = migration as agriculture becomes more difficult
- Resource distribution
- Pop. growth & distribution linked to water & resources availability
- E.g. desert = small pop. because lack of water
- Lack of safe water, food insecurity, health problems & death = pop. decrease
- Places w/ natural resource e.g. food & fuel = large populations
- Energy & mineral resources cause local concentrations of people
- Pop. growth & distribution linked to water & resources availability
- Climate
- Development processes affect pop. change
- Neolithic revolution
- 12,000 y/a devleoped agriculture
- E.g. West Asia, East China
- Lifestyle change from hunter gatherer to farming - permanent settlements
- Pop. increase as food supply more reliable
- 12,000 y/a devleoped agriculture
- Industrial Revolution
- 1760-1850 increase in machinery factories
- Major pop. growth e.g. Britain more than doubled
- Death rate fell because more food & money = better Diest
- Farming = less labour intensive = people move to cities = more concentrated populations
- Neolithic revolution
- Density
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