1. Organisational questions of nature conservation (14 January 1956).

2. Discussion of the Nature Conservancy Law and the projects of the orders of the Council of Ministers of the Estonian SSR (24 November 1956).

3. Popularisation of nature conservation, the instruction in elementary principles of nature conservation at secondary schools and higher educational institutions of the Estonian SSR (23 November 1957).

4. The organisation of complex research in nature conservation areas and reserves of the Estonian SSR (29 November 1958).

5. The celebration of the 20th anniversary of nature conservation in Estonia (26 November 1960).

6. The problems of rational use and protection of the water resources of the Estonian SSR (8 December 1962).

7. Protection of the atmosphere in the Estonian SSR (1 February 1964).

8. Problems of plant and animal protection in the Estonian SSR (27 March 1965).

9. School and nature conservation (15 October 1966).

10. Nature conservation and scientific research(4 April 1969).

11. V.I. Lenin and nature conservation (27 February 1970).

12. Research carried out in nature conservation areas of the Estonian SSR (23 March 1973).

13. Rare species and ecosystems in the Estonian SSR (25 January 1974).

14. Protection of the resources of nonliving nature and rarities in the Estonian SSR (14 February 1975).

15. Problems of the rational use and protection of the ground water in the Estonian SSR (13 February 1976).

16. Problems of the rational use and protection of the surface water in the Estonian SSR (11 March 1977).

17. Problems of the protection of the coastal waters of Estonia (24 March 1978).

18. Nature conservation and recreation (23 March 1979).

19. Legislation in nature conservation (4 April 1980).

20. Nature conservation and agriculture (20 May 1981).

21. Protection of the atmosphere in the Estonian SSR (12 March 1982).

22. Plant protection in the Estonian SSR (25 February 1983).

23. Animal protection in the Estonian SSR (23 March 1984).

24. Nature conservation and ecological education in the Estonian SSR (1 March 1985).

25. The problems of the management and protection of nature in Intermedial Estonia (4 April 1986).

26. Problems of soil protection in Estonia (13 March 1987).

27. Industrial civilisation and the health (11 March 1988).

28. The use and protection of Estonian forests (17 March 1989).

29. Nature conservation in self-managing Estonia (6 March 1990).

30. Nature protection in nature conservation areas (22 March 1991.

31. The state and protection of inland water-bodies in Estonia (24 April 1992).

32. Forest and man (12 May 1993).

33. The diversity of Estonian nature and its protection (11 May 1994).

34. Nature conservation outside nature conservation areas (16 May 1995).

35. Protection of water-bodies and life in them (16 May 1996).

36. Protection of forests (24 April 1997).

37. Green parks in cities and their protection (15 May 1998).

38. Waste management and nature conservation (21 May 1999).

39. Protection of Estonian wetlands (30 May 2000).

40. Seminatural communities and their conservation in Estonia. (15. May 2001).

41. Nature education in changing society. (24 May 2004).

42. Research and conservation of geological natural heritage. (22 May 2003).

43. Soil in ecosystems - study and conservation. (18 May 2004)

44. Is life without GMO-s possible? (27 May 2005).