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Difficulty: HardIdentifying Main Conclusions and Final Claims

Although proponents of urban vertical farming emphasize its potential to eliminate long-distance food transportation emissions, critics correctly point out that the energy required for artificial lighting and climate control often far exceeds the carbon savings achieved during transport. Nevertheless, evaluating vertical farming solely through its current energy grid footprint is shortsighted. As municipal energy grids transition toward renewable energy, the operational carbon overhead of vertical farms will decline dramatically, whereas urban land constraints and rural transportation logistics remain permanently fixed. Therefore, vertical farming will ultimately prove to be an essential component of sustainable urban food supply systems.

Which of the following best expresses the main conclusion of the argument above?

  1. A
    The carbon emissions generated by lighting and climate control in vertical farms currently exceed the emissions saved from shorter transit distances.
  2. B
    Evaluating vertical farming strictly by its present-day energy grid footprint is an inadequate approach.
  3. Urban vertical farming will ultimately become an indispensable element of sustainable municipal food networks.Answer
  4. D
    Transitioning urban power grids to renewable energy sources will completely remove all environmental drawbacks of vertical farming.
  5. E
    Long-distance rural transportation logistics represent the single greatest environmental challenge in modern agricultural supply chains.

Answer

Urban vertical farming will ultimately become an indispensable element of sustainable municipal food networks.
The main conclusion of the argument is stated in the final sentence: vertical farming will ultimately prove to be an essential component of sustainable urban food supply systems. The option stating that urban vertical farming will ultimately become an indispensable element of sustainable municipal food networks provides an exact paraphrase of this claim without altering its scope or tone.

Step-by-Step Solution

1
Analyze the structural components and indicators in the passage.
Identified background context, a concession to critics ('critics correctly point out...'), an intermediate conclusion ('evaluating vertical farming solely... is shortsighted'), premises regarding renewable grid transitions, and a main conclusion indicator ('Therefore').
Structural indicators help distinguish premises and subsidiary claims from the author's primary thesis.
2
Isolate the final claim supported by the entire reasoning chain.
The final sentence ('Therefore, vertical farming will ultimately prove to be an essential component of sustainable urban food supply systems') is supported by all preceding claims and supports no further claim.
The main conclusion of a Critical Reasoning argument is the ultimate claim for which all other statements serve as evidence or context.
3
Match the isolated final claim to the correct paraphrase among the answer choices.
The statement expressing that vertical farming will ultimately become an indispensable element of sustainable municipal food networks directly matches the final claim in meaning.
An accurate main conclusion option must preserve the scope, tone, and specific assertion of the author's main claim without introducing unstated extrapolations.

Key Concept

Identifying Main Conclusion in Arguments with Counterarguments and Intermediate Claims
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Topics

Identifying Main Conclusions and Final Claims

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