Plastic waste can also be injected to the BF, thereby reducing the demand for coke.  As the plastics also contain hydrogen, they can also provide additional benefits similar to natural gas injection.  The theoratical limit for plastics injection is estimated to be 70 kg/t-HM (rates of 67 kg/t-HM have been practiced in Germany). Every ton of plastics used in BF can replace 750 kg of coke. The Cl and PVC content of plastic waste is a concern - particularly given that PVC may give rise to dioxing production and thus necessitate additional flue gas treatment.  Therefore, plastic waste need to meet certin composition requirements for its suitability (IPPC, 2009. p.356).  The availability and cost effectiveness of waste plastic can limit the applicability of this measure in China and India.