Increasing Carrying Capacity Flashcards
The green revolution refers to…
a package of agricultural improvements. By Dr Borlong
(Japan) How many % are over 60?
33%
Japans TFR is around…
1.4
Food security is when…
all people at all times have access to sufficient, safe and nutritious food to maintain a healthy life.
(Green revolution) India was the first country which…
benefit when HYVs programme started in 1966-67.
(Green revolution) The HYVs introduced new…
hybrid varieties of five kinds of cereal. All resistant to droughts.
Advantages of the green revolution:
- yields are 2-4 times greater
- shorter growing season=introduction of new crops
- farming incomes increased
- better diet for rural communities
- increased employment for farm suppliers
Disadvantages of the green revolution:
- high inputs of fertilisers and pesticides
- HYVs more prone to pests
- mechanisation=increased rural unemployment
- small farmers did not benefit as much
- increased irrigation=salinisation
Examples of constraints in sustaining population:
- war
- trade barriers
- climatic and other hazards
- climate change
War is a major issue for…
development. It alters the ability of a country to sustain its population. It can send development back by decades.
Trade barriers such as…
tariffs, quotas and regulations are too strict for LICs implemented by HICs. This reduces export.
Climatic and other hazards are…
short term. E.g. droughts, hurricanes, earthquakes, volcanoes.
Climate change is a long…
term effect. It may increase the frequency of extreme events.
The carrying capacity is…
the largest population that the resources of a given environment can support. Advances in technology can increase it.
An ecological footprint is a measure…
of humanity’s demand on the natural environment. It is measured in global hectares.