Ishaan30
Quote:
Nitrogen dioxide is a pollutant emitted by automobiles. Catalytic converters, devices designed to reduce nitrogen dioxide emissions, have been required in all new cars in Donia since 1993, and as a result, nitrogen dioxide emissions have been significantly reduced throughout most of the country. Yet although the proportion of new cars in Donia's capital city has always been comparatively high, nitrogen dioxide emissions there have showed only an insignificant decline since 1993.
Quote:
Yet although the proportion of new cars in Donia's capital city has always been comparatively high
I had a question regarding the statement underlined above. Is the proportion of new cars in the capital city high compared to the new cars in the other cities? Or is the proportion of the new cars in the capital city high compared to the old cars in the capital city?
I found the language a bit ambiguous here because the interpretation went in two different directions and therefore, eliminating (A) was difficult.
It doesn't really matter, because, either way, we know that nitrogen dioxide (N2O) emissions have been significantly reduced throughout most of the country. So if the capital city has a higher proportion of new cars compared to the rest of the country, then we would certainly expect a decrease in N2O emissions in the capital. Likewise, if the capital simply has more new cars than old cars, then we would still be left wondering why N2O emissions have not significantly decreased.
That said, choice (A) contradicts the second interpretation above, so let's go with the first (which makes sense based on the word "comparatively"). In that case, maybe 45% of the cars in the capital city are new while only 30% of the cars in the rest of the country are new. Having catalytic converters in 30% of the cars could certainly explain the significant reduction in N2O in the rest of the country, so we're still left wondering why the capital city hasn't seen similar results.
(A) doesn't explain the discrepancy, so we can eliminate it.