The Chinese government has launched a major drive against food containing prohibited additives illegal cooking oil stale pork and spurious drugs. The Ministry of Public Security launched the initiative Thursday which will be carried out throughout 2012. It aims to ensure people's dinner table safety Xinhua quoted a ministry's statement as saying. The police will keep up the pressure on clenbuterol a banned chemical that makes pork leaner. It can be harmful to humans and dirty cooking oil to prevent them harming the society the statement said. Under the campaign the police will target sale purchase and slaughter of pigs.