Links
Links to further information
World Health Organisation (WHO)
nfluence of ultra violet light on the human skin - English
US Environmental Protection Agency
Comprehensive information about IAQ (Indoor Air Quality) - English
Institut für Biochemie an der Universität Bern
A highly recommended report on the subject of genetics - German
Zentrum für Mikroskopie der Universität Basel
Excellent microscopic pictures of micro-organisms - German / English