1 Subjects: “...national park...”

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

3 Subjects: “...National Health and Nutrition Examination Surveys...”

4 Subjects: “...Gran Paradiso National Park...”

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

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

7 Subjects: “...national sustainable development plans...”

8 Subjects: “...national park...”

9 Subjects: “...national park management...”

10 Subjects: “...National Health Service (NHS)...”

11 Subjects: “... National liberation and independence...”

12 Subjects: “...national parks...”

13 Subjects: “...nationally determined contribution...”

14 “... national economies and the crisis-stricken world economy and thus stabilize capitalism. Together...”

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

16 “... bold attempts at steering the nations in the world in the direction of ecologically sustainable...”

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

18 “.../regional/national/social level. A wide range of subjects linking the applied natural sciences...”

19 “... for humanity. As His Excellency António Guterres, Secretary-General of the United Nations, said, "Climate...”

20 “... in socio-economic dimension, urbanization etc.), in the urban space particularly in developing nations...”