Question

Q 2-A. How much CO₂ was generated in the four manufacturing stages needed to make $1,000 of product A?

Q2-B. How many worker-hours are required in all four manufacturing stages to make $1,000 of product?

Q 2-C. If each worker generates 8.2 tons of CO₂ per year due to his/her individual consumption to support their lifestyle, how much CO₂ are generated in total (including those occurred in manufacturing and consumption of workers) in making $1,000 of product A? What percentage of this total figure is “caused” by workers’ individual consumption?

Table 2-A: Input-output table for making product A

Input	Output
Electricity, 450 kWh	Product A, $1,000
Material X, 56 kg	CO2, 140 ton
Material Y, 900 kg
Number of worker-hours, 200

Table 2-B: Input-output table to make Electricity

Input	Output
Material X, 1.2 ton	Electricity, 1,000 kWh
Number of worker-hours, 15	CO2, 850 ton

Table 2-C: Input-output table to make Material Y

Input	Output
Electricity, 960 kWh	Material Y, 1.0 ton
Number of worker-hours, 100	CO2, 570 ton

Table 2-D: Input output table to make Material X

Input	Output
Number of worker-hours, 75	Material X, 100 kg

(use process tree and matrix solution to solve question A and B of this problem)

Answer 1