An ingredient used in Coca-Cola and Pepsi is a cancer risk and should be banned, an influential lobby group has claimed.美国一家颇具影响力的机构近日声称在可口可乐和百事可乐中发现一种致癌物，要求禁止使用该物质。The concerns relate to an artificial brown colouring agent that the researchers say could be causing thousands of cancers.‘The caramel colouring used in Coca-Cola, Pepsi, and other foods is contaminated with two cancer-causing chemicals and should be banned,’said the Center for Science in the Public Interest (CSPI), a health lobby group based in Washington, DC.位于美国华盛顿特区的公共利益科学中心（CSPI）认为在可乐中发现的焦糖色可以使数千人有致癌的风险，应当禁止使用。This morning Coca-Cola rejected the CSPI’s concerns. A spokesman said: ‘Our beverages are completely safe. CSPI’s statement irresponsibly insinuates that the caramel used in our beverages is unsafe and  maliciously raises cancer concerns among consumers. This does a disservice to the very public for which CSPI purports to serve. Studies show that the caramel we use does not cause cancer.’今早，可口可乐公司回应了公共利益科学中心（CSPI）的指责，一名发言人表示，“我们的饮料是绝对安全的。CSPI很不负责任地在声明中质疑我们饮料中所使用的焦糖色的安全性，并无端挑起消费者对癌症的担忧。CSPI一直宣称是服务于大众的非政府组织，但此举却是对公众的损害而非服务。研究表明，我们产品中使用的焦糖色不会导致癌症。”