Explain the relationship between overpopulation and diminishing water supplies.
  • As human populations grow they consume more water, not just by drinking, but through all of the other human activities that require freshwater such as agriculture, bathing, cleaning, etc. Overpopulation, therefore, can lead to overconsumption as populations use more water than an area can support and replenish sustainably.
  • Constant supplies of freshwater are needed because body water is continually being lost.
  • The defining characteristic of potable water is that it can be consumed without risk of harm. Potable water is of a sufficiently high quality and purity that it lacks pathogens or contaminants that might otherwise pose a hazard to humans.
  • Around the world the most significant restriction on access to potable water is money. While access to raw water sources, clean or otherwise, is important, the purification process itself is expensive. Once water has been rendered potable, it is important that it be delivered without reintroducing contamination. The most convenient way to deliver potable water is through underground pipes, which requires expensive infrastructure.
water intoxication
  • an imbalance in electrolyte levels caused by consuming too much water
  • water that is drinkable without risk of immediate or long term harm
  • a tiny fraction of Earth's freshwater
  • the body's electrolytes are out of balance
Drinking non-potable water does not carry significant health risks.
  • True
  • False
Describe the most significant restriction on access to potable water around the world.
  • As human populations grow they consume more water, not just by drinking, but through all of the other human activities that require freshwater such as agriculture, bathing, cleaning, etc. Overpopulation, therefore, can lead to overconsumption as populations use more water than an area can support and replenish sustainably.
  • Around the world the most significant restriction on access to potable water is money. While access to raw water sources, clean or otherwise, is important, the purification process itself is expensive. Once water has been rendered potable, it is important that it be delivered without reintroducing contamination. The most convenient way to deliver potable water is through underground pipes, which requires expensive infrastructure.
  • all of the above
  • The amount of water needed to sustain a person is highly variable because it depends upon not only the temperature and humidity of the environment where they live but the level of physical activity they engage in as well. People engaging in low levels of activity in cool temperate climates will need less water to survive than people engaged in highly strenuous activity in hot, dry climates.
desalination
  • the body's electrolytes are out of balance
  • a tiny fraction of Earth's freshwater
  • the removal of groundwater exceeds the rate at which it is replenished
  • the process of removing salt from water
Explain why water is critically important to most facets of human life.
  • The defining characteristic of potable water is that it can be consumed without risk of harm. Potable water is of a sufficiently high quality and purity that it lacks pathogens or contaminants that might otherwise pose a hazard to humans.
  • Not only is water necessary for the physical survival of humans, but many, if not most, human activities also make use of it. Agriculture is critically dependent upon continual supplies of freshwater. Human households also use freshwater daily for cleaning and laundry as well as for transporting sewage to waste treatment plants.
  • As human populations grow they consume more water, not just by drinking, but through all of the other human activities that require freshwater such as agriculture, bathing, cleaning, etc. Overpopulation, therefore, can lead to overconsumption as populations use more water than an area can support and replenish sustainably.
  • Around the world the most significant restriction on access to potable water is money. While access to raw water sources, clean or otherwise, is important, the purification process itself is expensive. Once water has been rendered potable, it is important that it be delivered without reintroducing contamination. The most convenient way to deliver potable water is through underground pipes, which requires expensive infrastructure.
potable water
  • the removal of groundwater exceeds the rate at which it is replenished
  • More than two thirds of Earth's freshwater is stored in glaciers and icecaps.
  • an imbalance in electrolyte levels caused by consuming too much water
  • water that is drinkable without risk of immediate or long term harm
The principle reason that most of North America and Europe do not have difficulties with access to potable water is their wealth.
  • True
  • False
In developed nations, the water delivered to homes by pipe is generally potable.
  • True
  • False
Identify what constitutes the defining characteristic of potable water.
  • Around the world the most significant restriction on access to potable water is money. While access to raw water sources, clean or otherwise, is important, the purification process itself is expensive. Once water has been rendered potable, it is important that it be delivered without reintroducing contamination. The most convenient way to deliver potable water is through underground pipes, which requires expensive infrastructure.
  • Not only is water necessary for the physical survival of humans, but many, if not most, human activities also make use of it. Agriculture is critically dependent upon continual supplies of freshwater. Human households also use freshwater daily for cleaning and laundry as well as for transporting sewage to waste treatment plants.
  • As human populations grow they consume more water, not just by drinking, but through all of the other human activities that require freshwater such as agriculture, bathing, cleaning, etc. Overpopulation, therefore, can lead to overconsumption as populations use more water than an area can support and replenish sustainably.
  • The defining characteristic of potable water is that it can be consumed without risk of harm. Potable water is of a sufficiently high quality and purity that it lacks pathogens or contaminants that might otherwise pose a hazard to humans.
Explain why the amount of water a person needs to survive can be highly variable.
  • Not only is water necessary for the physical survival of humans, but many, if not most, human activities also make use of it. Agriculture is critically dependent upon continual supplies of freshwater. Human households also use freshwater daily for cleaning and laundry as well as for transporting sewage to waste treatment plants.
  • The amount of water needed to sustain a person is highly variable because it depends upon not only the temperature and humidity of the environment where they live but the level of physical activity they engage in as well. People engaging in low levels of activity in cool temperate climates will need less water to survive than people engaged in highly strenuous activity in hot, dry climates.
  • Around the world the most significant restriction on access to potable water is money. While access to raw water sources, clean or otherwise, is important, the purification process itself is expensive. Once water has been rendered potable, it is important that it be delivered without reintroducing contamination. The most convenient way to deliver potable water is through underground pipes, which requires expensive infrastructure.
  • As human populations grow they consume more water, not just by drinking, but through all of the other human activities that require freshwater such as agriculture, bathing, cleaning, etc. Overpopulation, therefore, can lead to overconsumption as populations use more water than an area can support and replenish sustainably.
The world's supply of freshwater is increasing.
  • True
  • False
groundwater overdraft
  • an imbalance in electrolyte levels caused by consuming too much water
  • water that is drinkable without risk of immediate or long term harm
  • the removal of groundwater exceeds the rate at which it is replenished
  • the body's electrolytes are out of balance
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