Corn and soybean seeds colored red and blue, respectively, have become an all-too-common sight on U.S. farms. The seeds are given a colorful hue because they’ve been treated with neonicotinoid pesticides, and the coloring is one of the only ways to tell them apart from their untreated, yellow counterparts.

“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.

Thomas Burrell, a soybean grower for more than 50 years, noticed something was off last August, two months before harvest: The soybean pods planted in about 2,000 acres in the northern Mississippi Delta were flat and not maturing. But when he saw other soybean fields that used a more familiar seed variety, he said, they were vibrant and fuller.

Monsanto Co. lost a court ruling that permits key witnesses to testify in a lawsuit claiming the company’s Roundup weed killer caused cancer for farmers and other users. It’s a significant victory for the cancer victims, who need expert testimony to advance more than 300 suits in San Francisco federal court seeking to hold Monsanto liable for failing to warn consumers about the risk of using the weed killer.