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1.3 - GM crops
Descripción
A-level (Food) Geography G3 Mapa Mental sobre 1.3 - GM crops, creado por RoryFlynn2 el 04/06/2013.
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food
geography g3
geography g3
food
a-level
Mapa Mental por
RoryFlynn2
, actualizado hace más de 1 año
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RoryFlynn2
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Resumen del Recurso
1.3 - GM crops
The Green Revolution: India
Resulted in record grain output of 131 million tonnes in 1978-79
Yield per unit of farmland improved by more than 30%
The Punjab
Grows 20% of India's wheat
GR = 200% increase productivity
'65 - feeds 12 on 2.5 acres
'07 - feeds 30 one same land
Nearly 3x increase
Big land owners benefit mostly
Intensive farming = soil degradation + water shortages
1 million don't have access to safe water
Water shortages can cause food shortages
Fear of famine - leading to food insecurity
Countries importing food from a nation lacking water - taking virtual water - water footprint
Crude oil is also becoming increasingly important for food production - focus of crops is changing
E.g. 1 tomato uses up approx 1/3 of a litre of oil in a greenhouse
Advantages of GM crops
More food available - bigger harvests than 20 yrs ago
Bigger harvests = more income + occasionally cheaper food
Populous countries like India, Indonesia and Thailand
Self sufficient
No longer dependant on US + EU
Environmental impact of rural people lessened by urban migration
India + Thailand now export grain
Useful foreign export
Increased employment all year round
Disadvantages of GM crops
Bigger granaries storing more grain isn't enough
Distribution is still uneven
Farmers who can't afford GM - Crops lose value
Rich/Poor divide widened
Increased dependency on imported GM seeds, pesticides, machinery
New farming methods = increased water borne diseases, devpt of 'super-pests' and desertification
Eutrophication
Biodiversity lost
Imports of seeds, petrochemical fertilisers and fuel for machinery all costs foreign exchange
Control given to multinationals
Profits invested into machinery - reduced employment
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