Collectively, the Beijing Olympics are associated with a variety of problematic topics: the ecological impact, residential displacement due to construction, treatment of migrant workers, the government's political stance on Tibet, etc. In the lead-up to the Olympics, the government allegedly issued guidelines to the local media for their reporting during the Games: most political issues not directly related to the games were to be downplayed; topics such as pro-Tibetan independence and East Turkestan movements were not to be reported on, as were food safety issues such as "cancer-causing mineral water". As the 2008 Chinese milk scandal broke in September 2008, there was widespread speculation that China's desire for a perfect Games may have been a factor contributing towards the delayed recall of contaminated infant formula.