To mark World Water Day, Greenpeace activists, volunteers and the general public place posters by the Rhine Falls as part of the ongoing Detox campaign calling on the fashion industry to eliminate hazardous chemicals from their supply chains. The posters reading: 'Wollen Sie ein schmutziges Geheimnis erfahren?' translated in English: 'Do you want to know a dirty secret?' are covered with a special non-toxic ink. When the posters are washed, they reveal the fashion industry’s ‘Dirty Little Secret’ whose products contain chemicals that break down in water to form toxic and hormone-disrupting substances. After the washing the posters are saying: 'Globale Kleidermarken verschmutzen Flüsse mit gefährlichen Chemikalien. Handeln Sie jetzt!' translated in English: 'Global clothing brands pollute rivers with hazardous chemicals. Act now!'.