MCQOPTIONS
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				| 1. | 
                                    Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere in future? | 
                            
| A. | Atomic warfare | 
| B. | Co2 from fossil fuels | 
| C. | Dust clouds from valcanoes | 
| D. | Depletion of earth's ozone layer | 
| Answer» C. Dust clouds from valcanoes | |