Non-natural raw materials pollute
False. According to the dictates of the circular economy, raw materials of a non-natural origin, i.e. coming from other production processes and recoverable in the cement production cycle, may contain – as well as natural raw materials - chemical elements that are also present in nature and possible non-natural elements incorporated in the product. The concentrations of these elements are verified at the time of authorization for recovery and must be subject to the limits imposed by the permits.
The Integrated Environmental Authorizations issued to cement plants, often following stringent Environmental Impact Assessments, regulate the use of these materials and provide for their control. Moreover, the peculiar intrinsic characteristics of the cement production process, the high temperatures the raw materials are subjected to in the clinker and cement production cycle, facilitate the elimination of any non-natural compounds.
The Integrated Environmental Authorizations also regulate the plants' emission limits, which must be adapted to the sector's best available technologies (BAT) and constantly respected. At the time of authorization it may happen that stricter emission limits are imposed precisely because of the request to use alternative raw materials and unconventional fuels, further safeguarding the environment and demonstrating that the use of such materials does not worsen the plants' emission performance.