One of the countries where alcohol has been very successfully used as motor fuel is:

🧠 Explanation:

Brazil successfully uses alcohol as motor fuel, a biofuel innovation. Knowing this helps students and science enthusiasts understand renewable energy. Alcohol fuel is key for studying environmental science or engineering in school. Learning this helps with science projects or exploring biofuels. It’s useful for science classes, making it relevant for understanding sustainability. Knowing Brazil’s use helps students grasp its impact, ensuring better comprehension for academic work or general knowledge about alternative fuels.