Why can alcohols be used as fuels?

Alcohols can be used as fuels because they contain a high energy content and can be combusted to release energy. They produce fewer harmful emissions compared to traditional fossil fuels, making them a cleaner alternative. Additionally, many alcohols, like ethanol and methanol, can be produced from renewable resources such as biomass, contributing to energy sustainability. Their relatively high octane ratings also make them suitable for use in internal combustion engines.