The environmental organization Greenpeace launched on Oct. 16 — World Food Day — a campaign aimed to cancel solicitations made by transnational biotechnology companies to cultivate and sell transgenic corn. Greenpeace called upon citizens to sign a letter to outgoing President Felipe Calderón demanding the annulment of the recent requests made by US-based companies Monsanto, DuPont Pioneer and Dow Agrosciences to commercially cultivate transgenic corn on 1.7 million hectares (4.25 million acres) in the states of Tamaulipas (northeast) and Sinaloa (northwest).