試題詳解

46. What is the main purpose of this passage?
(A) To prove that conservation is still contributive to lessening the extent of global warming.
(B) To elaborate on potential factors, other than carbon dioxide emissions, of global warming.
(C) To explain possible reasons for clouds and particles to affect the range of global warming.
(D) To persuade readers that the receding of glaciers does supply a strong proof of global warming.