resource management Flashcards
what is irrigation
artificially watering land
water extracted from reservoirs and rivers and spread through pipes
two positives of irrigation
allows (semi) arid land to be used
can grow crops in dry season
two negatives of irrigation
excess evaporation leads to contaminated and salinized soil - unusable
irrigated crops often “cash crops”, not for locals
what is the new green revolution
using modern farming techniques eg chemicals, different seeds, machinery, to increase food production in poor areas/communties
2 positive of new green revolution
better quality and higher yield
disease resistant
3 negatives of new green revolution
fertilisers and pesticides are expensive, small farmers fall poor
damage environment
eutrophication
what is biotechnology
using living organisms to make of modify products/processes
eg gm crops
2 positive of biotechnology
genetically modified
good yields and crops
2 negatives of biotechnology
ethical controversy
not fully understood
what is fracking
liquids injected at high pressures into rock to extract natural gas
3 advantages of fracking
increased energy security
no need to rely on imports - oil £ vary
creates jobs
4 negative of fracking
should invest in renewables
carbon footprint & expensive
contaminated groundwater
earth tremors/disruptive to locals
physical vs economical water scarcity
physical: not enough to meet everyones needs
economic: area cannot afford infrastructure to supply water
4 reasons why we import food in the uk
diverse - variety demand
out of season produce
exotic
expensive in uk due to poor harvests
5 major facts of food waste
1/3 food is wasted
approx 10 billion need food by 2050
800 million hungry
600 million obese
2 billion over eat
