Residents attend a protest in front of the headquarters of the company "Monsanto", specialized on biotechnology, in the city of Buenos Aires, capital of Argentina, May 25, 2013. On Saturday, Argentine residents joined the international "World March Against Monsanto", held in over 40 countries against Monsanto, a company that produces transgenic seeds, according to local press reports. (Xinhua/Martin Zabala)

A resident holds a poster during a protest in front of the headquarters of the company "Monsanto", specialized on biotechnology, in the city of Buenos Aires, capital of Argentina, May 25, 2013. On Saturday, Argentine residents joined the international "World March Against Monsanto", held in over 40 countries against Monsanto, a company that produces transgenic seeds, according to local press reports. (Xinhua/Martin Zabala)

Residents attend a protest in front of the headquarters of the company "Monsanto", specialized on biotechnology, in the city of Buenos Aires, capital of Argentina, May 25, 2013. On Saturday, Argentine residents joined the international "World March Against Monsanto", held in over 40 countries against Monsanto, a company that produces transgenic seeds, according to local press reports. (Xinhua/Martin Zabala)