Envi Sci SA#6 Review

All of the following factors can cause famines except

• the failure of food production to keep pace with population growth

• distribution problems caused by political turmoil

• new, higher-yield crops

• crop failure brought on by sustained drought

Which of the following best describes why many people in the world go hungry?

• There is plenty of food produced for everyone to have more than enough, but it is not distributed equally.

• Food production hasn't increased as fast as the human population.

• Global warming has contributed to crop failures.

• In recent years, the human population has been growing, while food production has been falling.

Which is the best indicator of a population's health and nutritional status?

• number and causes of death

• gender of newborn babies

• number of government food programs

• number of low-birth weight infants

Which scenario is most likely to be a direct impact of a growing human population on the environment?

• Increased biodiversity for use in feeding the growing human population

• Decreased land availability for growing food to feed the growing human population

• Increased plant species to be used in developing new medicines and pharmaceuticals

• Decreased caloric needs per person as the human population continues to grow

Sulfur and nitrogen compounds in the air can combine to form what type of pollution?

• ozone

• hay fever

• smog

• ammonia

How do many coal-powered factories change the environment?

• by causing acid rain

• by releasing oil into the ocean

• by releasing pesticide into the air

• by causing increased erosion

What is the greatest threat to biodiversity today?

• rainforests

• reduction of hunting or fishing

• habitat destruction

• conservation efforts

Which of the following is the best solution to meet energy demands while protecting the environment?

• grow more corn to produce ethanol

• find and burn new sources of oil and coal

• improve energy efficiency and reduce energy waste

• build more nuclear power plants

Biologists believe that a large number of species that are part of the rainforest ecosystem are on the verge of extinction.

Which statement BEST describes the role of urbanization in this disaster?

• Urbanization leads to deforestation and loss of habitat for many species.

• Many animals are captured or killed by poachers, significantly reducing their numbers.

• Viral epidemics that break out in human populations spread to animals in the ecosystem.

• Factories cause a significant rise in temperature in the forests, endangering many species.

Jill has decided that she wants to start conserving gasoline. Jill is concerned about the rising price of gas, as well as how the by-products from gas engines pollute the atmosphere.

What solution would help Jill solve this problem?

• Deciding to use premium unleaded instead of regular unleaded gasoline.

• Deciding to drive her car less until the price of gas goes down.

• Deciding to move to a city where smog from automobiles is not a problem.

• Deciding to ride her bicycle to and from work, instead of driving.