Which fuel type is typically associated with producing fewer emissions?

The fuel type often associated with producing fewer emissions is ethanol. Ethanol, which is derived from plant materials, tends to burn more cleanly than fossil fuels like gasoline, diesel, and coal. When combusted, ethanol produces lower levels of carbon monoxide, particulate matter, and a mix of other pollutants compared to traditional gasoline. Additionally, ethanol contributes less to greenhouse gas emissions, as its carbon dioxide (CO2) emissions can be offset by the CO2 absorbed by the plants used to produce it during their growth process.

Gasoline, while a common fuel, typically emits higher levels of harmful pollutants and greenhouse gases than ethanol. Diesel is known for its efficiency in terms of energy production but often emits larger amounts of NOx and particulate matter. Coal is one of the most polluting energy sources, releasing significant quantities of carbon dioxide, sulfur dioxide, and heavy metals when burned.