Question

11 mark for review
the supply of earths fresh water is fixed and is being depleted at a rapid rate. which of the following best describes the effects of a limited freshwater supply on human populations?
a disease transmission will decrease as access to water decreases, leading to improved public health.
b conservation measures will increase per capita water consumption, leading to an improved global economy
c desalinization facilities will be used to process water stored in glaciers and snow packs, leading to new sources of drinking water.
d world food production will decrease, leading to increased famine.

Explanation:

• Option A: With less access to water, hygiene (like hand - washing) becomes difficult. This actually increases disease transmission, not decreases it. So, this option is incorrect.
• Option B: Conservation measures aim to reduce per - capita water consumption, not increase it. And there is no direct link between increased per - capita water consumption (if it were the case) and an improved global economy in the context of limited freshwater supply. So, this option is wrong.
• Option C: Desalination facilities process saltwater (from oceans, etc.), not water stored in glaciers and snow packs. Glacial and snow - pack water is already freshwater (in a frozen state). So, this option is incorrect.
• Option D: Agriculture (a major part of food production) requires a significant amount of water. A limited freshwater supply will reduce the amount of water available for irrigation. As a result, crop yields will decrease, which can lead to increased famine. This option is correct.

Answer:

D. World food production will decrease, leading to increased famine.