Which of the following are types of pollutants found in groundwater?
nitrates
inorganic ions
synthetic organic chemicals
pathogens
all
Water stress occurs when more than ________ of the available fresh water is being used.
10%
Which of the following inorganic compounds is NOT of particular health concern in the water system?
iron
Agriculture demands an average of _____ of the world's fresh surface waters, making it the largest consumer of fresh water.
70%
The main steps of water treatment include which of the following?
a. sedimentation
b. coagulation-flocculation
c. filtration
d. disinfection
All
Which of the following is NOT normally used for water disinfection?
evaporation
Primary treatment of wastewater is largely a _________ process.
mechanical
T/F: The heat absorption from the sun to transform water into different states is an important component of the hydrological cycle.
True
T/F: It is believed that most of the easily accessible sources of fresh water are currently in use.
True
T/F: Our current water supplies can NOT meet the huge demand of water.
True
T/F: Water scarcity and unclear water rights can cause or exacerbate national and international conflict.
True
T/F: The countries most affected by water scarcity are developing countries.
True
T/F: Sustainable water use implies that current needs are met without diminishing the resource for future generations' use and at no expense to environmental need.
True
T/F: 60% of the water used in agriculture is lost to evaporation or runoff.
True
T/F: The bulk of domestic water use in the United States serves for flushing toilets, showering, and watering lawns.
True
T/F: Desalinization is NOT yet being used in this world to obtain fresh water.
False
T/F: Many of the claims on bottled water, such as "pure" and "natural" are meaningless, as these terms are NOT regulated by any government agency.
True
T/F: Many industrial discharges are considered point sources, as they enter waterways at a single location.
True
T/F: After the treatment of sedimentation, coagulation-flocculation, filtration, and disinfection, the water should be free of most contaminants.
True
List the three major categories of water consumers in the world.