Question 2 of 21

Overfishing has threatened thousands of marine species. In 2006, Americans ate an average of ____ pounds of fish per person.

... Americans love fish, consuming an average of 16.5 pounds (7.5 kilograms) per person, up four pounds since 1980.

Question 3 of 21

Which of the following shark species is endangered because of overfishing?

... Sharks are particularly hard hit by overfishing. In the Atlantic Ocean, the shark population has decreased by 50 percent since 1970.

Question 4 of 21

This country has nearly depleted all the anchovies once found off its shores.

... Peru has run down its stock of the small fish, which is used for feed in aquafarms.

Question 5 of 21

Mankind's tendency to introduce species to new environments threatens local ecosystems. Which of the following species is not indigeneous to North America?

... Domestic cats first arrived in North America with early colonists. As an invasive species, they became a predator to native species, including the now-extinct Dodo bird.

Question 6 of 21

Americans constitute this percentage of the world's population but are responsible for this percentage of global carbon emissions.

... Despite having a population one-quarter the size of China, America emits nearly as much carbon dioxide as the much larger nation.

Question 7 of 21

What percentage of U.S. energy is powered by coal?

... Coal is the primary source of U.S. energy, in spite of its impact on global warming.

Question 8 of 21

How many bald eagles were killed in 1989's Exxon Valdez oil spill?

... Two hundred fifty bald eagles died, along with 2,800 sea otters, 300 harbor seals and 22 killer whales.

Question 9 of 21

The 3 Rs of recycling are "____, reuse, recycle"?

... School children across the country are taught to "reduce, reuse, recycle," the EPA's unofficial energy reduction slogan.

Question 10 of 21

Which country has the most endangered species in the world?

... Ecuador has more than 2,200 endangered species -- almost twice as much as any other nation.

Question 11 of 21

Which form of wildlife has the largest number of exctinct species?

... The vast majority of species that have become extinct are insects.

Question 12 of 21

What percentage of mammals are considered "globally threatened."

... Twenty four percent of mammals on the planet are regarded as threatened, which is one classification short of endangered.

Question 13 of 21

When was the Environmental Protection Agency established?

... The EPA was established under the Clean Air Act, which was signed into law by President Nixon in 1970.

Question 14 of 21

Fact or Fiction: There are as many cars as people in the United States.

... Fiction: There are approximately .75 cars for every individual in the U.S.

Question 15 of 21

How many pounds of carbon dioxide does one car emit per year?

... In one year, an average car creates 12,000 pounds (5,443 kilograms) of carbon dioxide, the most common greenhouse gas contributing to global warming.

Question 16 of 21

Which of the following is a greenhouse gas?

... Methane accounts for 8 percent of the weight of America's greenhouse gases, behind only carbon dioxide.

Question 17 of 21

What percentage of the world's automobiles are in the United States?

... Thirty percent of the cars in the world are in the U.S., and Americans contribute 45 percent of the world's autmotive carbon emissions.

Question 18 of 21

Which of the following will take the longest to decompose?

... A rubber tire won't ever decompose naturally, since there are no biological organisms that can feed on vulcanized rubber.

Question 19 of 21

Animal waste on farms is a major contributor to greenhouse gases. A single hog excretes how many pounds of waste a day?

... A hog produces 17.5 pounds (7.9 kilograms) of waste a day. On a factory farm containing 35,000 hogs, more than four million pounds of waste are produced each week, and more than 200 million pounds each year.

Question 20 of 21

Which country loses the most forest every year?

... Brazil loses 8,915 square miles (23,090 sq. km) of forest every year. Between 1990 and 2005, it lost forests the size of California.

Question 21 of 21

Overpopulation is one of the biggest factors in global warming. The number of people born every week worldwide is equal to the population of which U.S. city?

... Two hundred thousand people are born every day, or 1.4 million each week, roughly equivalent to the size of the seventh-largest U.S. city, San Antonio.

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