Klaus Lanz is a chemist, water researcher and publicist. He has been working on water issues for more than 20 years, initially as an environmental researcher at universities in the USA and Switzerland. From 1988 to 1992, he headed the water department of Greenpeace Germany. Since then, he has consulted on international water issues and authored numerous research papers and books.

Lars Müller, born in Oslo in 1955 and a Norwegian citizen, has been based in Switzerland since 1963. After becoming a graphic designer in Zurich, extended travels, and a one-year assistant position with designer Wim Crouwel in Amsterdam, Müller established his studio in Baden/Switzerland in 1982. In 1983, Müller published his first book and as Lars Müller Publishers, with offices in Zürich, has produced some 600 titles to date.

Christian Rentsch (*1945) was culture and media editor at the Swiss newspaper "Tages-Anzeiger" for over thirty years. Since 2004, he has written as a freelance journalist for various magazines and book projects. He is the co-editor of “Who owns the water?” (2006) and "For Climate's Sake!” (2011). Christian Rentsch lives in Zurich.

René P. Schwarzenbach (*1945) earned his diploma degree from the Chemistry Department at ETH Zurich where he got his PhD in 1973. After he completed his habilitation, Schwarzenbach was a full professor of Environmental Chemistry at the Department of Environmental Sciences at ETH Zurich. From 2004 on, he served as head of that department until his retirement in January 2011. Schwarzenbach received the SETAC Environmental Education Award and the Award for Creative Advances in Environmental Science & Technology from the American Chemical Society. He co-authored a textbook on environmental organic chemistry that has established itself as the standard text in this field.