How Human Activity Causes Changes To The Cycles

Question 1

Water cycle- shortages

Answer 1

Growing demand for water for irrigation, public supply etc has made acute shortages. E.g. colorado basin, SW America

Question 2

Water cycle- overpumping aquifiers in coastal regions

Answer 2

Decline in the quality of fresh water resources e.g in Bangladesh there have been incursions of salt water, making water unfit for drinking and irrigation

Question 3

Water cycle- deforestation

Answer 3

This has led to increased surface run off and less through flow

Question 4

Carbon cycle- fossil fuel

Answer 4

84% of global energy consumption comes from fossil fuels which has caused a depletion of carbon stores by removing billions of tonnes of carbon from the geological store

Question 5

Carbon cycle- deforestation

Answer 5

Reduced the planets forest cover by 50% which reduces carbon stored in biosphere

Question 6

Carbon cycle- wetlands

Answer 6

Drained for cultivation are development which are being depleted