SECOND LARGEST DUTCH CITY BANS MONSANTO'S DEADLY ROUNDUP HERBICIDE. Some cynics write off citizen action, including petitions and sign-carrying protestors. They don’t believe such small efforts can make any big difference. But the more than 600,000 people of Dutch city Rotterdam disagree. Their efforts, which began with a petition, have led to a “green initiative” in their city that has banned Roundup, Monsanto’s flagship product.