Which of the following is true about CNG vehicles?

Answer: B — They generally emit fewer pollutants

CNG vehicles, or compressed natural gas vehicles, are designed to be more environmentally friendly compared to traditional gasoline vehicles. One of the most notable benefits is that they typically emit fewer pollutants, including carbon dioxide, nitrogen oxides, and particulate matter. This reduction in emissions is crucial for improving air quality and lowering the overall environmental impact of transportation. The other statements about CNG vehicles are not accurate. For instance, CNG vehicles are often more efficient overall in terms of fuel consumption compared to gasoline vehicles, particularly regarding emissions. Maintenance needs can vary, but CNG vehicles might not necessarily require more maintenance than traditional vehicles; in fact, they can benefit from having cleaner combustion, which may lead to less wear and tear over time. Furthermore, CNG vehicles are designed to operate effectively in a variety of weather conditions, not just warm weather. Hence, while they may exhibit some operational preferences, they are not limited solely to warmer temperatures.