Below are the marginal costs of abating pollution for one firm in an industry with many firms. The firm is now emitting 10ton/week. Suppose we wish to reduce total emissions in the industry and introduce a tax of $11/ton of pollution. Firm Abatement Cost and Pollution Tax Table:

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Emissions 10 MAC TAC Total Tax Bill ($1 1/ton) Total costs 0 0 110 110 9 ON 5 99 104 8 00 9 14 88 102 7 12 28 77 103 6 14 40 66 106 5 in 20 60 55 115 4 27 87 44 131 E 35 122 33 155 N 44 156 22 178 54 220 11 285 65 285 0 350 Emissions 10 MAC TAC Total Tax Bill ($1 1/ton) Total costs 0 0 110 110 9 ON 5 99 104 8 00 9 14 88 102 7 12 28 77 103 6 14 40 66 106 5 in 20 60 55 115 4 27 87 44 131 E 35 122 33 155 N 44 156 22 178 54 220 11 285 65 285 0 350