What characteristic of CNG helps in reducing the environmental impact?

Answer: B — It has lower emissions compared to gasoline and diesel

The characteristic of compressed natural gas (CNG) that contributes to reducing environmental impact is its lower emissions compared to gasoline and diesel. When CNG combusts, it produces significantly fewer pollutants such as nitrogen oxides (NOx), particulate matter, and carbon dioxide (CO2) than traditional fossil fuels. This reduction in harmful emissions leads to improved air quality and decreases the overall greenhouse gas contribution, making CNG a more environmentally friendly option for transportation. In contrast, aspects like cost, the energy required for extraction, and greenhouse gas production highlight the disadvantages of fossil fuels and don't align with the environmentally beneficial properties of CNG. Specifically, these factors do not reflect the capacity of CNG to minimize emissions, which is essential for sustainable energy use and meeting environmental regulations. Therefore, the significant reduction in emissions associated with CNG is the key feature that contributes positively to reducing its overall environmental impact.