The singer Willie Nelson has joined with 300,000 other activists in a lawsuit against the U.S. agricultural giant Monsanto, citing the company’s practice of suing small farmers whose fields have been contaminated by Monsanto’s genetically modified seeds. The suit was filed as part of the “Occupy the Food System” campaign protesting the corporate takeover of small farms and the use of harmful pollutants like Monsanto’s “Roundup” herbicide.