TOPSHOT - Argentine environmentalist Sofia Gatica is arrested by police officers as a farmer records the action and soybean field owner Alejandro Dalmasso (R) tries to throw other demonstrators out, after they tried to stop the spraying in Dique Chico, Cordoba province, Argentina, on January 20, 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 DIEGO LIMA / AFP)