

MCQOPTIONS
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1. |
Consider the following statements:A) Earth would be safer without greenhouse effectB) Major contribution to the greenhouse effect comes from carbon dioxideC) Earth's climate was changing even before man appeared on earth |
A. | and B) only |
B. | and C) only |
C. | and C) only |
D. | A), B) and C) |
Answer» C. and C) only | |