Exam 20: Water Pollution and Its Prevention

Biochemical oxygen demanding wastes (BOD)include

A farmer extending his farm field bulldozes the banks of a creek,greatly disturbing the creek bed and stirring up clay and humus.The higher levels of clay and humus in the water just downstream will most likely result in

A new gravel road is cut into the side of a mountain just north of Anchorage,Alaska.As the snow melts in June,the fine gravel and sand of the disturbed region quickly tumbles into the bottom of nearby streams.The addition of this fine gravel and sand changes the stream by

-The method illustrated in these figures is testing water for

On average in the United States,every day each person produces about

Which of the following processes requires an oxygen-free environment and produces large volumes of methane that can be used for fuel?

-The water conditions indicated in this figure reveal a body of water that most likely has

When cities dumped sewage into natural waterways with limited capacity for dilution,

A small neighborhood pond averaging about 3 meters in depth reveals all the signs of cultural eutrophication,most likely from runoff of lawn fertilizers used by the residents.The water is very cloudy and oxygen levels remain very low,resulting in few fish that can survive.To provide some opportunities for the neighborhood kids to regularly catch fish,the neighborhood association decides to purchase,install,and run a large water fountain in the middle of the pond. -How could this water fountain help address the eutrophication of this pond? The water fountain will

The EPA's efforts to enforce the Clean Water Act for CAFOs,mountaintop removal mining,and storm water discharges have been opposed by

What do wastewater treatment facilities primarily depend upon for the breakdown of pathogenic organisms and organic materials in wastewater?

The ultimate responsibility for public policy legislation controlling the waters of the United States is the

-This small residential pond in the middle of this subdivision is most likely

Eutrophication of Lake Washington near Seattle was largely addressed by limiting levels of

Which of the following activities is most directly related to the dead zones in the Gulf of Mexico just west of the Mississippi River?

Biological nutrient removal ultimately converts most of the organic materials in wastewater into

The Cuyahoga River in Ohio had been so polluted that it caught fire repeatedly from 1868-1969,including a 1952 fire that resulted in nearly $1.5 million in damages.Amazingly,other rivers in the United States also caught fire during this period. -These fires on the Cuyahoga River raised concerns that contributed to

The Cuyahoga River in Ohio had been so polluted that it caught fire repeatedly from 1868-1969,including a 1952 fire that resulted in nearly $1.5 million in damages.Amazingly,other rivers in the United States also caught fire during this period. -Why didn't federal laws limiting pollution of rivers and streams prevent this pollution and these fires?