QUESTION 16Protected nature preserves are established for all of the following reasons except to set aside green space that cannot be developed  to protect the habitat of organisms living there to preserve the natural beauty of Earth to protect the ozone layer from CFC use1 points   QUESTION 17Earth's growing population makes it more difficult to protect the environment for all of the following reasons except a larger number of people requires more food and therefore more land must be cleared for farming a larger number of people will farm native plants instead of invasive species a larger number of people requires more housing and therefore more land must be cleared for homes a larger number of people will be producing solid waste1 points   QUESTION 18Planting a variety of trees in an area would have all of the following positive effects except conserve energy reduce erosion by holding soil in place reducing global warming by taking in more carbon dioxide increase biodiversity1 points   QUESTION 19When traveling back from an island, such as Hawaii, regulations forbid you to bring back fruit, shells, or anything native to the island without proper inspection by the US Department of Agriculture.  Why do such strict rules exist? A. The rules are an effort to preserve the biodiversity of the island. B. The rules are an effort to reduce the transfer of non-native species. C. The rules are an effort to limit travel, which burns fossil fuels. D. Both A and B1 points   QUESTION 20All of the following help to reduce harmful carbon dioxide levels in the environment except relying on solar power planting trees burning fossil fuels using electricity generated by hydro-power1 points   QUESTION 21The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that ecosystems are interconnected and human action can alter ecosystem equilibrium recycling programs have failed to conserve biotic resources natural processes can alter ecosystem stability direct harvesting practices have led to irreversible destruction of ecosystems1 points   QUESTION 22New fuels are being produced by converting corn and grasses into compounds containing alcohols that can be broken down for energy in various engines. The purpose of this research is to reduce the use of finite resources increase the rate of air pollution reduce the rate of homeostasis in organisms cause a loss of biodiversity in the rain forests1 points   QUESTION 23Which action by humans could improve the quality of the air? building homes that use only oil furnaces for heat buying cars that get more miles per gallon of gasoline increasing the number of coal-burning power plants that generate electricity cutting down forests to clear land for factories1 points   QUESTION 24Some people see the benefit of wind energy as a clean alternative to fossil fuels for energy production. Others believe it is dangerous for migratory birds. These opinions best illustrate that decisions about alternate energy sources will usually favor older methods of energy production over newer methods must be made by weighing the risks and costs against the benefits must be made by taking into account the present needs of the citizens without looking toward the future should be the responsibility of each individual1 points   QUESTION 25Which human activity is most responsible for the other three human activities? increasing demand for food increasing loss of farmland increasing human population increasing air pollution