the fact of being green in colour 带绿色的;浅绿色的 the greenness of the countryside 乡村的青葱翠绿
the fact of being covered with grass or other plants 长满青草的;绿油油的;青葱的 A warming trend on Arctic land causes an increase in greenness. 北极土地变暖的趋势导致绿色增加。
the fact of supporting or promoting the protection of the environment 绿色: 支持或促进环境保护