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Difficulty: HardEvaluating Argument Support and Weakening Across Tabs

Consider the following multi-source information regarding VeloCity's urban e-scooter deployment program:

Tab 1: Executive Proposal (Transportation Board)
To reduce downtown carbon emissions, VeloCity proposes subsidizing a 500-unit shared e-scooter fleet. The proposal asserts that replacing short-distance commuter car trips with zero-emission e-scooter rides will reduce overall transportation-related carbon emissions in the downtown core by at least 15%15\% within twelve months.

Tab 2: Municipal Traffic & Environmental Audit
A recent survey of downtown commuters revealed that 72%72\% of micro-mobility trips (including e-scooters) replace walking, cycling, or public transit journeys rather than personal motor vehicle trips. Furthermore, tabular data on total lifecycle emissions for the proposed e-scooter model is presented below:

Stage / Impact FactorGrams CO2CO_2 Equivalent per Passenger-Mile
Manufacturing & Raw Materials4545
Daily Fleet Collection & Charging (Diesel Vans)6565
Operational Electricity1010
Total Lifecycle Impact**120120**

*Note: Walking and cycling generate 00 g CO2CO_2/mile; downtown public transit averages 5050 g CO2CO_2/mile; average inner-city passenger car generates 110110 g CO2CO_2/mile.*

Statement to Evaluate:
Evaluating the data across both tabs demonstrates that the introduction of the e-scooter fleet, as currently operated, is more likely to increase total downtown transportation carbon emissions than to achieve the proposed 15%15\% reduction.

Answer: Answer

Answer

True. The cross-tab evidence demonstrates that the e-scooter lifecycle emissions (120 g CO2/mile) exceed those of cars (110 g CO2/mile) and public transit (50 g CO2/mile), and that most trips replace zero- or low-emission transport modes.
The evaluation statement is true because synthesizing Tab 1's core claim with Tab 2's empirical data shows that e-scooters emit 120 g CO2/mile (higher than inner-city cars at 110 g CO2/mile) and mostly replace walking, cycling, or public transit (0–50 g CO2/mile).

Step-by-Step Solution

1
Analyze the claim in Tab 1.
The executive proposal claims that deploying e-scooters will lower downtown carbon emissions by replacing car trips.
Establishing the core premise requires identifying the assumed mechanism of emission reduction.
2
Integrate lifecycle emission data from Tab 2.
Total e-scooter emissions equal 45+65+10=12045 + 65 + 10 = 120 g CO2CO_2/mile, which exceeds average inner-city car emissions (110110 g CO2CO_2/mile).
A comprehensive evaluation must account for manufacturing, re-charging transport, and maintenance emissions rather than operational electricity alone.
3
Integrate commuter displacement survey data from Tab 2.
Only 28%28\% of e-scooter trips replace car trips, while 72%72\% replace walking (00 g), cycling (00 g), or transit (5050 g).
Determining net emissions impact requires comparing the new mode's emissions against the actual modes being displaced.
4
Synthesize cross-tab evidence to evaluate the statement.
Shifting trips from walking/transit (00-5050 g CO2CO_2/mile) or cars (110110 g CO2CO_2/mile) to e-scooters (120120 g CO2CO_2/mile) increases overall net carbon emissions.
Since net emissions per passenger-mile rise across displaced modes, the program will increase emissions rather than achieve a 15%15\% reduction.

Key Concept

Evaluating Argument Support and Weakening Across Tabs
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Evaluating Argument Support and Weakening Across Tabs

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