The various processes deliver tons of steel (P1, steel mill), kWh of electricity (P2, wind power plant), m3 of concrete (P3, concrete production), and tonne-km of transport (P4, rail transport). The flow chart is as follows:

You are given that the direct climate emissions from each process per unit produced are as follows

Calculate the life cycle emissions in kg CO2 of a total final consumption of 15 tonne-km of transport and 2 m3 of concrete

Vi bruker flqende A-matrise: \begin{tabular}{|l|l|l|l|l|} \hline & P1, per tonn & P2, per kWh & P3, per m3 & P4, per tonn-km \\ \hline kg CO2 & 1200 & 0.005 & 500 & 0.05 \\ \hline \end{tabular}