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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 shown only an insignificant decline since 1993.
Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donia's capital city?
  • a)
    More of the cars in Donia's capital city were made before 1993 than after 1993.
  • b)
    The number of new cars sold per year in Donia has declined slightly since 1993.
  • c)
    Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.
  • d)
    Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.
  • e)
    Most car trips in Donia's capital city are too short for the catalytic converter to reach its effective working temperature.
Correct answer is option 'E'. Can you explain this answer?
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Nitrogen dioxide is a pollutant emitted by automobiles. Catalytic conv...
(A) More of the cars in Donia's capital city were made before 1993 than after 1993.
If a significant portion of the cars in the capital city were manufactured before 1993, it means they are not equipped with catalytic converters. Since these older cars are not subject to the requirement of catalytic converters, their emissions would still contribute to nitrogen dioxide pollution, leading to the insignificant decline in emissions.
(B) The number of new cars sold per year in Donia has declined slightly since 1993.
If the number of new cars being sold has decreased since 1993, it means there is a smaller proportion of newer cars with catalytic converters entering the capital city. If the decrease in new car sales is not offset by a significant decrease in older car usage, it could explain why nitrogen dioxide emissions have not declined significantly despite the presence of catalytic converters.
(C) Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.
This option suggests that while other pollutants emitted by automobiles have been significantly reduced, nitrogen dioxide emissions may not have experienced the same level of reduction. If efforts have primarily focused on reducing other pollutants, it could explain why the decline in nitrogen dioxide emissions in the capital city has been insignificant.
(D) Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.
If a significant number of car owners with vehicles manufactured before 1993 have voluntarily installed catalytic converters, it would reduce their nitrogen dioxide emissions. However, if there are still a substantial number of cars without catalytic converters in the capital city, it could offset the impact of newer cars with converters and result in only a negligible decline in nitrogen dioxide emissions.
(E) Most car trips in Donia's capital city are too short for the catalytic converter to reach its effective working temperature.
As explained earlier, catalytic converters need to reach a certain temperature to function optimally. If most car trips in the capital city are short, the converter may not reach its effective working temperature, limiting its ability to effectively reduce nitrogen dioxide emissions. This option provides a plausible explanation for the insignificant decline in emissions despite the presence of catalytic converters.
Among these options, option (E) provides the most direct explanation for the insignificant decline in nitrogen dioxide emissions in Donia's capital city.
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Nitrogen dioxide is a pollutant emitted by automobiles. Catalytic conv...
Explanation:

Short Car Trips:
- One possible explanation for the insignificant decline in nitrogen dioxide emissions in Donia's capital city is that most car trips there are too short for the catalytic converter to reach its effective working temperature.
- Catalytic converters are most effective when they reach a certain temperature, usually achieved during longer trips.
- Short car trips may not allow the catalytic converter to function optimally, leading to less effective reduction in nitrogen dioxide emissions.
Therefore, option E is the most suitable answer as it provides a plausible reason for why nitrogen dioxide emissions have not significantly declined in Donia's capital city despite the requirement for catalytic converters in new cars since 1993.
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Nitrogen dioxide is a pollutant emitted by automobiles. Catalytic conv...
(A) More of the cars in Donia's capital city were made before 1993 than after 1993.
If a significant portion of the cars in the capital city were manufactured before 1993, it means they are not equipped with catalytic converters. Since these older cars are not subject to the requirement of catalytic converters, their emissions would still contribute to nitrogen dioxide pollution, leading to the insignificant decline in emissions.
(B) The number of new cars sold per year in Donia has declined slightly since 1993.
If the number of new cars being sold has decreased since 1993, it means there is a smaller proportion of newer cars with catalytic converters entering the capital city. If the decrease in new car sales is not offset by a significant decrease in older car usage, it could explain why nitrogen dioxide emissions have not declined significantly despite the presence of catalytic converters.
(C) Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.
This option suggests that while other pollutants emitted by automobiles have been significantly reduced, nitrogen dioxide emissions may not have experienced the same level of reduction. If efforts have primarily focused on reducing other pollutants, it could explain why the decline in nitrogen dioxide emissions in the capital city has been insignificant.
(D) Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.
If a significant number of car owners with vehicles manufactured before 1993 have voluntarily installed catalytic converters, it would reduce their nitrogen dioxide emissions. However, if there are still a substantial number of cars without catalytic converters in the capital city, it could offset the impact of newer cars with converters and result in only a negligible decline in nitrogen dioxide emissions.
(E) Most car trips in Donia's capital city are too short for the catalytic converter to reach its effective working temperature.
As explained earlier, catalytic converters need to reach a certain temperature to function optimally. If most car trips in the capital city are short, the converter may not reach its effective working temperature, limiting its ability to effectively reduce nitrogen dioxide emissions. This option provides a plausible explanation for the insignificant decline in emissions despite the presence of catalytic converters.
Among these options, option (E) provides the most direct explanation for the insignificant decline in nitrogen dioxide emissions in Donia's capital city.
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Climatic conditions are delicately adjusted to the composition of the Earth’s atmosphere. If there were a change in the atmosphere—for example, in the relative proportions of atmospheric gases—the climate would probably change also. A slight increase in water vapor, for instance, would increase the heat-retaining capacity of the atmosphere and would lead to a rise in global temperatures. In contrast, a large increase in water vapor would increase the thickness and extent of the cloud layer, reducing the amount of solar energy reaching the Earth’s surface.The level of carbon dioxide, CO2, in the atmosphere has an important effect on climatic change. Most of the Earth’s incoming energy is short-wavelength radiation, which tends to pass through atmospheric CO2 easily. The Earth, however, reradiates much of the received energy as long-wavelength radiation, which CO2 absorbs and then remits toward the Earth. This phenomenon, known as the greenhouse effect, can result in an increase in the surface temperature of a planet. An extreme example of the effect is shown by Venus, a planet covered by heavy clouds composed mostly of CO2, whose surface temperatures have been measured at 430. If the CO2 content of the atmosphere is reduced, the temperature falls. According to one respectable theory, if the atmospheric CO2 concentration were halved, the Earth would become completely covered with ice. Another equally respectable theory, however, states that a halving of the CO2 concentration would lead only to a reduction in global temperatures of 3.If, because of an increase in forest fires or volcanic activity, the CO2 content of the atmosphere increased, a warmer climate would be produced. Plant growth, which relies on both the warmth and the availability of CO2 would probably increase. As a consequence, plants would use more and more CO2. Eventually CO2 levels would diminish and the climate, in turn, would become cooler. With reduced temperatures many plants would die; CO2 would thereby be returned to the atmosphere and gradually the temperature would rise again. Thus, if this process occurred, there might be a long-term oscillation in the amount of CO2 present in the atmosphere, with regular temperature increases and decreases of a set magnitude.Some climatologists argue that the burning of fossil fuels has raised the level of CO2 in the atmosphere and has caused a global temperature increase of at least 1. But a supposed global temperature rise of 1 may in reality be only several regional temperature increases, restricted to areas where there are many meteorological stations and caused simply by shifts in the pattern of atmospheric circulation. Other areas, for example the Southern Hemisphere oceanic zone, may be experiencing an equivalent temperature decrease that is unrecognized because of the shortage of meteorological recording stations.The author refers toVenusprimarily in order to

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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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer?
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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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer? for GMAT 2025 is part of GMAT preparation. The Question and answers have been prepared according to the GMAT exam syllabus. Information about 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer? covers all topics & solutions for GMAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer?.
Solutions for 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer? in English & in Hindi are available as part of our courses for GMAT. Download more important topics, notes, lectures and mock test series for GMAT Exam by signing up for free.
Here you can find the meaning of 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer?, a detailed solution for 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer? has been provided alongside types of 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice 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 Donias capital city has always been comparatively high, nitrogen dioxide emissions there have shown only an insignificant decline since 1993.Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donias capital city?a)More of the cars in Donias capital city were made before 1993 than after 1993.b)The number of new cars sold per year in Donia has declined slightly since 1993.c)Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.d)Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.e)Most car trips in Donias capital city are too short for the catalytic converter to reach its effective working temperature.Correct answer is option 'E'. Can you explain this answer? tests, examples and also practice GMAT tests.
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