geography population and climate change

geography population and climate change

1. population pyramids

   • in EMDC
     • narrow base meaning not many children born
       • children are expensive
       • women want carrers
       • both parents have to work
       • family planning aviailble
       • later marriages mean less child bearing ages
     • economically active remains steady in pyramid meaning not many children die
       • good medical care
       • good food supply
       • good water supply
       • economically active shape can widen in sections. This shows that migrants entered the country
     • wider top as people live longer
       • good medical care
       • food and water supply is good
       • shelter aviable
       • women live longer than men this is because they have a stronger heart to withstand child birth
   • It displays the age and sex structure of (usually) a country or any other administrative area: a region, a local council or an urban/rural area
   • The shape of a population pyramid can tell us a lot about an area's population. It gives us information about birth and death rates as well as life expectancy. A population pyramid tells us how many dependents there are. There is two groups of dependents; young (0-15) and old (65+). Dependents rely upon the economically active (working population) for economic support
   • in ELDC
     • wide base as many children are born
       • to work on a farm
       • family planning
       • many children die ( high infant mortality rate)
       • to look after their parents when parents are old
       • religious beliefs
         • many young people are married off early and men usually have more than one wife
     • pyramid quickly thins as many children die
       • not enough doctors, midwives and nurses
       • not enough food
       • poor water supply
       • poor immune systems due to all other reasons
       • not enough medical facilities
     • narrow top due to low life expectancy
       • poor medical care
       • poor food supply
       • dirty water
       • poor shelter
       • poor immune systems so catch disease

2. the demographic transition model (DTM

   • the demographic transition model explains the transformation of countries from having high birth and death rates to low birth and death rates
   • in developed countries this transition began in the 18th century and continues today
   • less developed countries began the transition later and many are still in earlier stages of the model