Seventeen-year-old William Nuñez can’t walk or talk, and has to be fed through a tube in his stomach. Five-year-old Lucas Texeira suffers from a severe and incurable skin condition. Lucas Krauss has congenital microcephaly, epilepsy, delayed motor and mental development, multiple muscular atrophy and numerous related pathologies.

What do these children have in common? Their fathers, all farmers working in Latin America, were exposed to agricultural pesticides that likely damaged their DNA, increasing the risk of cancer, birth defects and neurological disorders in the children they later fathered.

They also have this in common: Their mothers are fighting for justice for their kids.

“Genetically Modified Children,” a new one-hour documentary, exposes how Philip Morris and Monsanto have exploited generations of impoverished Argentinian farmers since 1996, when the Argentinian government authorized the use of genetically engineered crops to withstand the use of Monsanto’s Roundup weedkiller.