Horse meat eaten without the knowledge of the consumer, due to accidental or fraudulent introduction of horse meat into human food. A 2003 Food Standards Agency (FSA) investigation revealed that certain sausages, salami and similar products such as chorizo and pastrami sometimes contain horse meat without it being listed, although listing is legally required. The 2013 horse meat scandal involved multiple products being recalled from shelves due to unlabelled horse meat in amounts up to 100% of the meat content. The issue came to light on 15 January 2013, when it was reported that horse DNA had been discovered in frozen beefburgers
Criticism of Tesco In September 2011 a Greenpeace report revealed that supermarkets in China, including Tesco, were selling vegetables that contained illegal pesticides or at levels exceeding the legal limit. 16 vegetable and fruit samples were taken from Tescos in Beijing and Guangzhou. Among them, 11 were found containing pesticide residues. One leafy vegetable sample turned up two kinds of pesticides, methamidophos and monocrotophos, the use of which have been prohibited in China since the beginning of year 2007. There have been several complaints against Tesco in Hungary, both by customers and employees. Two trade unionists employed by the company were dismissed in