40. The eradication of pollution is not merely a matter of ___ , though the majestic beauty of nature is indeed an important consideration.

A economics

B legislation

C cleanliness

D aesthetics

E restoration

选D

翻译：根除污染不单是为了美观，尽管恢复大自然的壮丽景色确实是一个重要的考虑因素。

legislation 立法，法规

cleanliness (有洁癖地)爱干净，有清洁习惯

restoration 恢复，修复，复原，物归原主，王朝复辟