In Colombia, the massive use of aerial fumigation to eradicate coca fields, as part of a strategy called Plan Colombia, has caused pesticide contamination of land and water, and serious health complaints from residents. The multinational firm Monsanto is the major manufacturer and retailer of Round-Up Ultra, a type of glyphosate used to fumigate illegal plantations. Monsanto has said this product is environmentally safe, denying any toxic effects on human health or environment. However, local rural and indigenous communities living in Putumayo, and other regions sprayed by herbicides, have reported that indiscriminate fumigation causes illnesses, destroys food crops and contaminates water supplies. The fumigations are to a large extent financed by US government aid programs. Still after more than ten years of aerial fumigations, their main purpose: the eradication of the coca plantations is far from being achieved.