The BBC reported some staggering new scientific research about cocaine consumption in the Po River Valley of northern Italy.
They say they found the equivalent of 40,000 doses a day in the Po valley, home to about five million people.
The study, published by the UK's Environmental Health magazine, tests sewage and rivers for levels of a by-product of cocaine metabolism.
The team say the test has to be refined before being applied on a vast scale.
The chemical found in the urine of cocaine users is called benzoylecgonine, or BE.
It is produced only metabolising cocaine.
Italian river 'full of cocaine' [BBC, Aug. 4, 2005]
Po River [wikipedia.org]