Life events as turning points for sustainable nutrition. In Ursuala Tischner, Eivind Stø, Unni Kjærnes, and Arnold Tukker (Eds.), System Innovation for Sustainability 3: Case Studies in Sustainable Consumption and Production – Food and Agriculture, 210-226, Greenleaf Publishing, Sheffield, 2010. [PUMA: Sowi5CK events life nutrition points sustainable turning]