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I don’t quite agree with the solution. Here the answer choice D, this is essentially questioning the premise that the strategy is work on vehicle emissions. D is out of scope. D would be correct IF it says "The plant which makes battery-powered vehicles is supplied by power sourced from coal fired power plant"
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Even if we assume that "The chemical plant's electricity is supplied by a coal-fired power plant", there is no way quantify the net pollution output and compare the same, and if we are to base it on general knowledge and common sense, Even when charged entirely by a coal-fired power plant, an electric vehicle typically produces lower overall greenhouse gas emissions than a diesel-powered car. So the goal of lowering net emission is being met. How can "C" be the answer ?
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Hi,

Why I think D is not a great answer choice.
Goal: eliminate/mitigate air pollution caused by diesel-fueled vehicles.
Process: Use battery powered vehicles instead.

Reason for this not being a good plan: Using electricity produced by a coal-fired plant to charge the battery powered vehicles just transfers the pollution and does not reduce it.

Why I don't think this is a great reason: It requires the read to assume that coal-fired power plants cause air pollution; and that this air pollution is more than that of diesel-fueled vehicles. I don't think the GMAT would require a person to know this and make such a judgment in the absence of quantitative data.
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akkkk1
Hi,

Why I think D is not a great answer choice.
Goal: eliminate/mitigate air pollution caused by diesel-fueled vehicles.
Process: Use battery powered vehicles instead.

Reason for this not being a good plan: Using electricity produced by a coal-fired plant to charge the battery powered vehicles just transfers the pollution and does not reduce it.

Why I don't think this is a great reason: It requires the read to assume that coal-fired power plants cause air pollution; and that this air pollution is more than that of diesel-fueled vehicles. I don't think the GMAT would require a person to know this and make such a judgment in the absence of quantitative data.

Thank you for the comment. Agreed that GMAT would not include comparison of diesel vehicles vs. coal power plan and you do not need to do that here. You need to find the answer choice that MOST weakens the plan, not prove that the choice is disastrous or results into more emissions. In this case, D) is the only choice that interferes with the plan.

About what's included in passages - the passage is only 2-3 sentences and usually things such as burning coal produces pollution is generally understood as well as general economic principles, market forces, and so on. However, for anyone not familiar with the concept of burning coal I will include a note that burning coal releases carbon dioxide.
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