The United States Environmental Protection Agency says tebuthiuron is very prone to leach into groundwater.

ECONOMIST: Colombia

Given the vagaries of aerial spraying, this would bar the use of tebuthiuron in many coca fields.

ECONOMIST: Colombia

Colombia's vigorous police chief, General Rosso Jose Serrano, argues that the damage caused by farmers clearing land for coca far exceeds any risk from tebuthiuron.

ECONOMIST: Colombia