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1) How is most of the electricity in the U.S. generated?
a) hydro electric power plants
b) oil, coal, and wood
c) nuclear power
d) solar energy
e) don't know
2) What is the most common cause of pollution of streams, rivers, and oceans?
a) waste dumped by factories
b) surface water run off
c) dumping of garbage by cities
d) trash washed into waterways
e) don't know
3) What do you think is the main cause of global climate change or the warming of the planet Earth?
a) more carbon emissions
b) sunlight radiating more strongly through ozone hole
c) increased volcanic activity
d) increase in oxygen in the atmosphere
e) don't know
4) What percentage of the world's water is fresh and available for use?
a) ten percent
b) thirty-three percent
c) five percent
d) one percent
e) don't know
5) The current reduction in the number of certain species of salt-water fish is primarily due to which of the following?
a) pollution of coastal waters
b) increased harvesting by fishing vessels
c) changes in water temperature
d) loss of fishing shoals and other deep sea habitats
e) don't know
6) What is the leading cause of childhood death worldwide?
a) malnutrition and starvation
b) auto and home accidents
c) germs in water
d) asthma from dust in the air
e) don't know
7) What is the most common reason that an animal becomes extinct?
a) human destruction of habitats
b) pesticides are killing them
c) too much hunting
d) climate changes
e) don't know
8) There are thousands of waste disposal areas-dumps and landfills-in the U.S. that hold toxic waste. What is the greatest threat posed by these waste disposal areas?
a) contamination of water supplies
b) chemical air pollution
c) human consumption through contaminated food
d) contact with farm animals and household pets
e) don't know
9) Many communities are concerned about running out of room in their community trash dumps and landfills. What is the greatest source of landfill material?
a) glass and plastic bottles and aluminum and steel cans
b) paper products including newspapers, cardboard and packaging
c) disposable diapers
d) lawn and garden clippings, trimmings, and leaves
e) don't know
10) Some scientists have expressed concern that certain chemicals and minerals may accumulate in the human body at dangerous levels. Primarily, what do these chemicals and minerals enter the body through?
a) drinking water
b) breathing air
c) living near toxic waste dumps
d) household cleaning products
e) don't know
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