overview evidence/examples Flashcards
deforestation evidence
30% of the world is covered by forests.
Over one third of the worlds forest has been lost during 1700-2018.
deforestation case study
Nigeria has lost a significant amount of its rainforest, with some estimates suggesting that up to 90% of its original tropical rainforest has been destroyed.
expansion and intensification of agriculture evidence
: 1/3 terrestrial land and 75% freshwater resources are dedicated to crop/live stock production
expansion and intensification of agriculture case study
The Green Revolution was a significant period in agriculture during mid-20th century, due to the introduction of efficient and powerful crop varieties, alongside increased use of fertilizers, pesticides, and irrigation systems, leading to a dramatic increase in food production
growth of urban settlement evidence
1-3% global urban land cover. Although small, land that is required undergoes a total transformation and has the greatest influence of environmental change.
growth of urban settlement case study
population growth and overseas migration, causes the construction of new residential dwellings.
Perth is the longest city in the world due to urban sprawl across the coast.
mining evidence
1% of the worlds terrestrial land is currently being used for mining, its an important industry for many and has significant impacts on environment
mining case study
WA mining industry is a key part of its economy, employing thousands of people, retrieving materials and resources, and contributing billions of dollars to the state’s revenue
impact on population growth evidence
8.2 billion currently
impact of growing affluence and advances in tech case study (brazil)
Type – rainforests cleared primarily for agriculture, driven by the need to expand urban areas. Need for resources + food due to growing population.
Rate – rapid urban growth (87% population) mainly due to migrant workers, demand for resources internationally. Always needs for food, resources and residential areas. Currently 203 million population. Increased Technological advances = increase rate
Extent – lost 68.9 mil hectares since 2001 (10.76% forests). Endangered species, reduce ability to store carbon, threatened indigenous people, water contamination. International trade + agriculture: soybeans, cotton, beef
australia government policy evidence
e.g. Argyle Mine - Closed 2020
Rehabilitation - Indigenous Land Use Agreement 2005
e.g. Western Australia’s Forest Management Plan 2024 – 2033
Softwood Plantations $350 million - sustainable timber
Preserves 400,000 hectares of forests
australia land ownership evidence
40% of protected land is classified as indigenous protected areas
brazil land ownership evidence
45% of all land in Brazil is owned by 1% of the population
brazil government policy evidence
Free Plots of Land Paid Citizens to Farm – 20,000sq km cut down each year (1978 - 1988
fire management
Many Australian native plants require heat or smoke for germination. Over 400 native species of seeds respond to this treatment, including eucalyptus seeds.
seasonal calendars evidence
during Birak (December and January) mosaic burning practises would occur
soil erosion and degradation evidence
Each year, an estimated 24 billion tonnes of fertile soil are lost due to erosion
loss of habitat and biodiversity
Human activities cause 75% of habitat loss
-400 marine dead zones globally
-1 million animal and plant species at risk
-Tropical rainforests contain over 50% of biodiversity
