Ch. 14-16 POLLUTION

How does the location of Los Angeles make it more susceptible to pollution?

• Its tropical location causes high temperatures, which increases air pollution.
• Its location in a bowl formed by mountains causes air pollution to get trapped.
• Its location on a large, flat plain exposes it to the wind, which carries air pollution.
• Its coastal location exposes it to pollution from the sea.

Dead zones, such as the one in the Gulf of Mexico that exists off the coast of Louisiana, are characterized by all of the following EXCEPT

• a reduced number of shellfish
• fish die-off events
• low nitrogen concentrations
• low oxygen concentrations in the water

The WHO estimates that approximately 1.1 billion people worldwide do not have access to sufficient safe-water supplies. This number represents about ____ of the world population.

• 1/29
• 1/3
• 1/4
• 1/6

Tests on water can be used to indicate the likelihood of human wastewater contamination by testing for indicator species such as

• Cryptosporidium
• fecal coliform bacteria
• Vibrio Cholerae bacteria
• Influenza

Given a feedlot of about 1200 cows, if an individual cow produces about 50 liters of manure a day, how many liters of manure would be produced in a month’s time?

• 60 kL
• 600 kL
• 180 kL
• 1800 kL

Bacteria are beneficial to wastewater treatment because

• they naturally break down organic matter
• they help solid material to settle out of the wastewater
• the nutrients produced are beneficial to the treated water
• they aren't beneficial

What substance is believed to be responsible for the development of eggs in the testes of some male fish?

• DDT
• PBDEs
• PCBs
• Reproductive hormones

The material rotating in the North Pacific Gyre can best be described as

• solid waste composed of mostly plastics
• organic waste dumped from cruiseships
• medical waste dumped by the United States
• coal slag dumped by China

The United States legislation that empowers the EPA to establish maximum contaminant levels in drinking water is

• The Clean Water Act
• The Safe Drinking Water Act
• The Clean Air Act
• The Superfund Act

The difference between a point source and a nonpoint source of water pollution is...

• a nonpoint source is easily identifiable
• point sources can be targeted for reduction
• nonpoint sources tend to be factory outputs
• point sources tend to be agricultural in nature