单选题 The author of the passage is primarily concerned with

• (A) articulating potential useful applications of the development of sustainable chemistry
• (B) suggesting the environmental dilemma posed by the usage of non-renewables
• (C) reconciling opposing theories on the effects of chemical pollution
• (D) describing how the methods of non-sustainable chemistry must be corrected
• (E) proving a general overview about how sustainable chemistry could improve human existence