But it has gained a new impetus in a world where climate change is already a reality, commodity prices are rising, and basic resources such as clean air, arable land, and fresh water are increasingly scarce. A growing body of science, including the United Nations Environment Program’s upcoming Global Environment Outlook-5, is confirming what was glimpsed at Rio 20 years ago.
&nbsp;“绿色经济”一词提出已经很多年了——甚至要早于1992年首届地球峰会——本意是为了提供考察经济和可持续性之间联系的新视角。但在气候变化已成现实、商品价格节节攀升、清洁空气、可耕土地和清洁水源日渐稀缺的世界中，绿色经济一词被赋予了新的含义。新的科学成果——包括联合国环境规划署即将发布的全球环境展望第五版（Global Environment Outlook-5）——正在确认20年前Rio 20所发现的问题。