(20)Manufacturing activities for which there are no technologically and economically feasible low-carbon alternatives but that support the transition to a climate-neutral economy should be considered transitional economic activities, as referred to in Article 10(2) of Regulation (EU) 2020/852. To encourage the reduction of greenhouse gas emissions, the thresholds of the technical screening criteria for those activities should be set at a level that will only be achievable by the best performers of each sector, in most cases based on greenhouse gas emissions per unit of output produced.