Increasing Carrying Capacity Flashcards
(28 cards)
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.
An ecological footprint for a country is…
the sum of all croplands, forests, fishing ground, carbon footprint to provide food for the country, energy and space for infrastructure.
The global hectare is a hectare with…
world-average ability to absorb wastes.
If global hectare is greater than…
biocapacity, it is unsustainable living.
Due to the Green revolution, Mexico has become self-
sufficient in wheat production by 1951.
The green revolution was introduced in Mexico in…
1943, resulting in heavy investment in rural infrastructure.
The Mexican population increased from…
13 million in 1901 to 103 million in 2005
The green revolution was an initiative to…
give countries time to check its population. It did not happen in Mexico.
An optimistic view of managing a growing population:
- checks on the TFR(sanctions, increased family planning)
- Top-down development to increase CC
- Bottom-up development to increase CC
The neo-Malthusian view is that…
with the increased population, there is greater demand for food. Less food for people so increased mortality and balance restored.
