Toxicological trivia from 31/10/11: Spanish Rivers carry cocaine, ecstasy, antibiotics, anti-inflammatory and a host of drugs and pharmaceuticals. They are the lifeblood of the country, the perfect place for a drug doping test in Spanish society. The scientist Damia Barcelo (Lleida, 1954), Institute of Chemical and Environmental Research of Barcelona (CSIC), has 15 years studying water pollution. In December 2007, stated that in Spanish rivers is you can find benzoylecgonine, the major metabolite of cocaine in a concentration of:
a) 100 nanograms per liter;
b) 200 nanograms per liter;
c) 300 nanograms per liter.

Correct answer c. Read more in Spanish article: Water that thou shalt not drink … In urban rivers in Spain there is more cocaine than ibuprofen