Uttar Pradesh Chief Minister Aditya Nath Yogi on Saturday said he was only following the directions of the National Green Tribunal (NGT) to close down illegal slaughterhouses in the state."In the past couple of years, NGT had given directions many times that illegal slaughterhouses in Uttar Pradesh should be closed down," Aditya Nath said during a rally here."The government would not trouble those slaughterhouses which are following the norms and have license. But the ones which are violating NGT norms, which are polluting the environment and posing threat to public health, would not be spared," he addedThe Chief Minister also said the government has already started the process to ban these slaughterhouses.