单选题 The passage suggests that the effects of volcanic carbon dioxide on the environment differ from those of sulfurous gases in that

• (A) carbon dioxide tends to alleviate environmental haze, while sulfurous gases usually increase it
• (B) carbon dioxide tends to increase temperatures by trapping sunlight, while sulfurous gases tend to decrease temperatures by blocking it
• (C) carbon dioxide tends to have an effect on the environment, while sulfurous gases for the most part do not
• (D) sulfurous gases have played an even more significant role than carbon dioxide in pushing environmental temperatures outside the habitable range
• (E) sulfurous gases tend to decrease the level of solar radiation outside the earth's atmosphere, while carbon dioxide plays only a negligible role