Despite 2 years of extensive herbicide spraying source country eradication, the U.S. estimates show that there has not been any net reduction in Colombian coca cultivation – the net coca cultivation has actually increased 50 percent.
To achieve a one percent reduction in US cocaine consumption, the United States could spend an additional $34 million on drug treatment programmes, or 20 times more, $783 million, on efforts to eradicate the supply at the source.