Promotion of sustainable environmental practices at suppliers, contractors and customers > Use of qualification criteria for suppliers and contractors and their subsequent assessment based on environmen tal performance of the activities carried out > Information-giving meeting on significant environmental aspects in the work start stage through the transmission of the environmental policy and explanation of the means of managing impacts produced by the activities under taken (waste, emissions, discharges, etc.) > Promotion and awareness-raising on the issues of sustainability and the circular economy throughout the supply chain 10.