![]() ![]() some marine fishes need the coral reefs upstream6. some marine fishes spends part of their life cycle upstream5. when dams break, the connection wall can be harmful to fishes4. Putting up dams along rivers negatively affect on marine fishes because _1. Which of the following is the major cause of coral-reef destruction?1. Monoculture cropping or planting a single crop in a large area is not advisable because it.1. Chlorofluorocarbons are popular as propellants and solvents because they are1. ![]() today, technology cannot effectively reduce harmful effects of nuclear waste disposal2. measures taken to control and dispose of waste from nuclear reactors have been fruitless5. nuclear scientists have not exerted enough effort to control and dispose the waste from radius safely4. waste from nuclear reactors can be disposed safely and efficientl圓. anything that has ill-effect on the ecosystem must be prohibited2. Nuclear power must be unfavorable because the wastes from nuclear reactions is highly fatal to life andunfriendly to the environment.1. PNPA SAMPLE QUESTION REVIEWER AND ANSWER KEYENVIRONMENTAL ISSUES1.
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