[youtube=http://www.youtube.com/watch?v=fq9mw8wR-1Q] "To mark World Water Day, on March 22nd Solidarités International and its agency BDDP Unlimited will roll out a campaign to build awareness of the scourge of undrinkable water. To evoke the silent and invisible threat of unhealthy water, BDDP Unlimited opted for a minimalist approach that is both visually appealing and surprising, using water and ink exclusively. The spot shows the power of ink to reveal the invisible."