quiz 7

Question 1

Explain deforestation’s impact on climate change?

Answer 1

1. Trees are carbon sinks because they store co2 during photosynthesis
2. co2 is released when trees are burnt
3. There is a higher concentration of co2 in the atmosphere
4. Infrared radiation is absorbed and remitted to earth
5. consequently earths temperatures increase

Question 2

Explain deforestations impact on soil erosion?

Answer 2

1. prior to deforestation the leaves of trees will slow rates of infiltration
2. tree roots bind the soil preventing soil erosion
   3.cutting down trees stop
   interception
   4.As there are no leaves to block rainfall infiltration will occur much faster
3. The soil will not be able to absorb all the water so it will be saturated
4. This will cause surface run-off so nutrients will be washed away causing the soil to be infertile

7.water that has been infiltrated
will wash out nutrients from the soil(leeching)

8. farmers will eventually have to move their subsitence/commercial farm because the soil has become infertile so they cant grow crops
9. farmers will have to cut down or burn more trees to access fertile soil

Question 3

Explain deforestation impact on economic development

Answer 3

1. TNC’S like valve provide 70k jobs at the carajas iron mine in Venezuela
2. High paying jobs in the primary sector
3. Local people have more disposable income
4. spend more in local businesses
5. Local businesses pay more taxes to the government
6. Government has more money to invest in services such as healthcare,education and infrastructure
7. Increased development attracting more TNcs

Question 4

outline the process of desertification

Answer 4

plants in an area reduced
their roots no longer prevent soil erosion
nutrients in the soil are washed away
the soil becomes sandy and infertile