Sunday Stamps N4 Denmark, Germany

My stamps on Danish navigation show different eras, but nothing from the time of issue.

Denmark - 24 September 1970

From Germany (West Germany) I found a stamp supposedly concerning protection of nature.

(West) Germany - 5 June 1973

'Umweltschutz luft' however translates as environmental  protection of the air.

(West) Germany - 13 May 1976

This rather splendid EUROPA stamp depicts a newspaper boy.

For more 'N' related stamps follow the links at https://seeitonapostcard.blogspot.com/2019/05/sunday-stamps-n.html