Sigmund Kvaløy Setreng and his Ecophilosophy: An Introduction By Bjørn Tordsson Bjørn Tordsson is a specialist in outdoor pedagogy. In 2014 he wrote this introduction to the life and work of Sigmund Kvaløy Setreng. View PDF Full Text Open Air Philosophy2019-08-01T10:31:58-04:00 Share This Article FacebookTwitterLinkedInPinterestEmail