Question

Find out the percentage of pollutants released into the air by automobiles in your city. Do you think introduction of (a) CNG and (b) electric vehicles in some of the cities has been helpful in reducing pollution levels?

Answer 1

In many major cities, automobiles contribute significantly to air pollution. For example, vehicles are responsible for over 80% of total air pollution in some urban areas. In cities like Delhi, Mumbai, and Kolkata, vehicle emissions account for a substantial portion of pollutants: 75% of carbon monoxide (CO), 45% of hydrocarbons, 40% of nitrogen oxides (NOx), and 30% of suspended particulate matter.

The introduction of Compressed Natural Gas (CNG) and electric vehicles (EVs) has been a promising strategy in reducing air pollution:

1. CNG Vehicles: CNG is considered a cleaner alternative to petrol and diesel. It emits fewer pollutants such as carbon monoxide, nitrogen oxides, and particulate matter. The adoption of CNG in cities like Delhi has led to some reduction in air pollution by replacing traditional fuels in vehicles.
2. Electric Vehicles: EVs produce zero tailpipe emissions, which significantly reduce pollutants like carbon monoxide, nitrogen oxides, and particulate matter. As a result, cities that have integrated electric vehicles into their public transport systems and as part of private fleets have seen improvements in air quality.

Overall, both CNG and electric vehicles have contributed positively toward reducing pollution levels, especially in areas with high vehicular traffic. However, these solutions need to be part of a larger strategy that includes better public transportation, stricter emission standards, and increased green energy sources for further significant improvements.