1 Subjects: “...Chinese national scenic areas...”

2 Subjects: “...Manu National Park...”

3 Subjects: “...national ambient air quality standards...”

4 Subjects: “...cross-national case study...”

5 Subjects: “...United Nations...”

6 Subjects: “...United Nations...”

7 Subjects: “...national parks...”

8 “... for Sustainable Development and the Sustainable Development Goals adopted by the United Nations in 2015. Already...”

9 “..., analyses regional policy on a national, regional, and continental scale with reference to the SADC...”