The United States has been providing assistance to Colombia since the early 1970s to help it in its efforts to reduce illegal drug production and drug-trafficking activities. As such, the U.S and Colombia have worked together in joint aerial eradication efforts of coca plantations since 1978. Within this context, in 1999 the Colombian government with the U.S support initiated Plan Colombia aimed at providing the Colombian National Police with the capacity to apply eradication pressure in more places simultaneously than previously possible. The attempts to achieve eradication through aerial fumigations of pesticides, one key component of Plan Colombia, started on December 2000 in the southern departments of Putumayo and Caqueta. Since then, aerial fumigations have been increasing in frequency, extension and concentration of chemical substances highly toxic to human health and the environment, contaminated the land and waterways with pesticide, also causing serious health problems for residents exposed to fumigation. In Colombia, local rural and indigenous communities denounced for many year the impacts of the aerial fumigations of glyphosate on their everyday life, challenging the national authorities to change their anti-drug policies strategy. Monsanto is known for being the major producer and retailer of Roundup Ultra glyphosate, used in the Colombian Plan fumigations.