题目选项分析

The term "sustainable" is widely applied to any practice that minimizes environmental impact, but in the case of building material

it designates a substance that is

recycled or contains lower volumes of volatile organic compounds.

The term "sustainable" is widely applied to any practice that minimizes environmental impact, but in the case of building material

they are substances that are

recycled or contains lower volumes of volatile organic compounds.

题目基本信息

难度：难