ANY attempt to put an economic value on fresh air, clean water or tropical rainforests can offend the delicate sensibilities of those who argue that the conservation of nature is a moral duty.

  • 任何企图给新鲜空气、清洁水源及热带雨林赋予经济价值都会冒犯某些人脆弱的敏感,他们认为保护自然是人类的道德责任。
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