3.1 - Great Africa Wall & China Afforestation

Question 1

Management Of Biosphere Affecting Climate Change

Answer 1

IPCC think low-emission food crops, reducing food water and diets will help reduce food consumption.
Preserving waterlogged peats will reduce CO2 released.
Restoring soils and afforestation will help store carbon again.

Question 2

Great Green Wall, Africa

Answer 2

The Sahara desert is expanding due to desertificartion.
1952 - 50km tree barriers
1970s - Drought events in Sahel
2007 - African Union approved 8000km long, 15km wide tree wall
Aims for sustainable management but progress is slow (highest in Senegal)

Question 3

Green Wall Of China

Answer 3

Over-exploitation of land has led to increased desrtification in NW China - Gobi Desert is expanding at a fast rate
Three North Shelterbelt programme - afforestation (4500km long), due to complete in 2050.

Question 4

Desertification

Answer 4

The degradation of arid ecosystems, they’re delicate due to water scarcity and added strains from humans.

Question 5

African Wall Outcomes

Answer 5

Tree roots held water in soil, decreasing drought conditions
Reduced food consumption costs
Created jobs for future generations

Question 6

Chinese Wall Outcomes

Answer 6

Reduced dust storms that pollute China
Soil degradation and artificial trees are less likely to survive.
Only 15% of trees survived

Question 7

Similarities Between China And Africa

Answer 7

Both attempt to stop desertification
Leaves provide compost and canopy means less watering is needed
Has been successful in reducing climate change so far
Progress is slow