1 Subjects: “...national nature reserve...”

2 Subjects: “...Halgurd-Sakran National Park...”

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

4 Subjects: “...National Health Services...”

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

6 “... published by MDPI on the topic. It highlights the most recent internationally/nationally funded projects...”

7 “... Development Goals (SDGs) set by the United Nations (UN). There are lots of challenges to developing modern...”