techno fix case studies Flashcards
The Ozone hole
CFC’s developed in the 20’s as refrigerants, allowed for better storing of medicines and food, however was found they were depleting the stratospheric ozone and their use was banned
DDT
Used to control malaria mosquitoes and as a pesticide, mosquitoes eventually became resistant and also caused deaths of other wildlife
India: A mobile nation
Landlines expensive and hard to get, mobile services set up in 1994 and usage since then has significantly increased. Growth fuelled by cheap handsets, low running coasts and lack of competition from landlines
Aids
lack of access to technology is causing it to spread, biomedical treatments and more research is needed. Most areas is effects are very poor. Could do with an attitudinal change
Geo-engineering ideas
space mirrors, ocean fertilisation, cloud whitening, stratospheric aerosols, synthetic trees
North Korea
government restricts access to technology, no internet and mobiles banned. Example of political factors affecting access to technology
Practical bottom up ideas
zeer pots, floating gardens, water distillation, bio latrines and biogas
Amish
religious choice not to use technology. Only use in great need e.g. communal phone
GM crops
would have economic benefit but not used in UK due to public opposition
3 Gorges Dam
provides hydroelectric power, clean energy source for future generations. A ninth of Chinas power a year
however many had to be relocated and the lake behind the dam is a dumping ground for sewage
China’s great green wall
wants to stem tide of sandstorms with barrier of trees, will take over 70 years to create the 2,800 miles of trees. would combat the effect of desertification as china loses 4 million hectares a year because of this
Green revolution for Africa
population growth has exceeded agricultural production growth so looking to develop drought resistant crops, water for irrigation, fertilisers, education and an access to market
