A soybean field is fumigated near Urdinarrain, Entre Rios province, Argentina, on February 8, 2018. - Soybean fields in Argentina are often fumigated with glyphosate, a herbicide which is probably carcinogenic according to the World Health Organization (WHO), but which is needed to maintain crops of transgenic seeds. The first trial for the possible effects of Round Up -Monsanto's polemic herbicide containing gliphosate- starts on July 9 in the US. (Photo by IVAN PISARENKO / AFP)        (Photo credit should read IVAN PISARENKO/AFP/Getty Images)