human geography- pop and environment

population distribution

spread of people over an area

population density

number of people in a area

pll per kilometer squared

physical factors of the environment

- climate

- geologuy/soil

- water supply

- ecosystems/vegitation/wildlfie

- topography

- natural hazards

environmental varibales that effect food growth

- climate

- soil (type, composition, neutreince levels)

food security

Having enough, affordable, nuetrishious, accessable food to feed a population

what is the green revolution

started in america

then enhanced to suit indias climate

the development of more productive, drought-tolerant, pest-resistant, higher-yielding types of grain

facilitated by crop modifcation using chamical fertalisers and pesticides

green revolution negative

pestisides pollute soil and water (nitrates in water changes the acidity and causes algea blooms that take the oxygen causeing fish death)

soft top soil hardens due to chemical residue

organic movement - possible?

lack of education around technology like fertalisers

double burden of neutrition

LICs and HICs are both malnourished

lics- low intake of food

hics- high intake of low nertrience food

open system

transphers both matter and energy from and to other systems

closed systems

only transphers energy to and from other systems

name the types of agriculture

- commercial

- subsistance

- intensive

- extensive

- organic/inorganic

commercial farming

where the majority of produce is sold for profit

make a livelyhood from this and the money is reinvested into the farm

subsistance farming

the majority of the produce is consumed by the farmer little is sold or reinvested

intensive farming

capital or labour intensive- lots of money/labour being invested for a high output

extensive farming

farming is carried out over a large area. no real pattern to amount of capital or labour in relation to the output tho

organic/inorganic farming

use or non-use of artificial chemicals

case studies for agricultural systems

austrialian sheep farming

arable system

what is agricultural productivity

measure of economic performance or agriculture and driver of farm income

- represents how efficiently they use resources that r available to turn financial inputs to relative outputs

hoe much of the earths soil in moderatly degraded

33%

horizons of soil

O horizon, A horizon,E horizon B horizon, C horizon, R horizon

the soil case studies

chernozerm

red/yellow latosols

3 stratergies for securing food security

production

distribution

demand

mortality

death

mesured by death rate and infant mortality

morbidity

illness can also describle the incidence of disease in a pop

well being

State of being comfortable, healthy, and happy.

health

defined by the WHO as a state of complete physical, social and mental well-being and not just the presents or absence of a disease

DALYS

measure of morbidity in a society. they measure the number of years of healthy life lost by being in poor health or in a state of disability

non communicable disease

condition or disease that isnt infectious and non-transmittable among people

how to work out DALY

years of life lost + years lost to disability

the WHO measures

HALE - healthy life expactancy

DALY - disability adjusted life years

sages of the epidemiology transition model

1) the age of pestilence and famine

2) age of receding pandemics

3) age of degenerative and man- made disease

4) age of delayed degenerative diseases

blue zone cummunities

area where people live the longest

over 100 yrs

sickest city case study

glasgow