Selecting the portland cement series as the research object, calculate the carbon emissions from the cement production process. When using this LCA dataset, ensure that the scope of the assessment includes the direct carbon emissions from the cement production process only. Do not account for the carbon emissions from the transport of raw materials or other indirect activities. Industrial wastes are excluded from resource consumption calculations. Caution should be applied if the data set is used for assessing impacts other than those stated, as transportation and additional environmental impacts are not considered in the data set.