it is about what are the most

1. Nature’ s warning Some of the largest problems now affecting the world are Acid Rain, Air Pollution, Global Warming, Hazardous Waste, Ozone Depletion, Smog, Water Pollution, Overpopulation, and Rain Forest Destruction .

5. Cause effect Consequence Natural processes, such as hurricanes, weather systems, and snowmelt, can cause floods . Destructive natural Disaster Destruction of life and property Spread of various infectious diseases A famine is a widespread scarcity of food that may apply to any faunal species. the prices increases malnutrition, starvation, epidemic, and increased mortality

7. Passive voice Tense Subject Auxiliary Past Participle Singular Plural Present The car/cars is are designed. Present perfect The car/cars has been have been designed. Past The car/cars was were designed. Past perfect The car/cars had been had been designed. Future The car/cars will be will be designed. Future perfect The car/cars will have been will have been designed. Present progressive The car/cars is being are being designed. Past progressive The car/cars was being were being designed

8. Before the semester was over, the Curriculum Committee and the Board of Trustees had approved the new nursing program. Before the semester was over, the new nursing program had been approved by the Curriculum Committee and the Board of Trustees. With five seconds left in the game, one of the players called an illegal time-out. With five seconds left in the game, an illegal time-out was called by one of the players,

9. Change the following active sentences to the passive. Many people have attacked Indiana Indiana (attack) by many people. Many people had attacked Indiana before he left for Egypt. Indiana (attack) many times before he left for Egypt. Indiana was teaching the female student who wrote "love you" on her eyelids. The student who wrote "love you" on her eylids (teach) by Indiana. Actually a friend wrote "love you" on the girl's eyelids. " Love you" (write) by a friend. The Germans are hunting Indiana. Indiana (hunt) by the Germans .