Alternative fuels research focuses on finding and developing sustainable and renewable sources of energy to replace traditional fossil fuels. This includes biofuels, such as ethanol and biodiesel, as well as hydrogen fuel cells, natural gas, and electric vehicles. The goal of alternative fuels research is to reduce greenhouse gas emissions, decrease dependency on limited fossil fuel reserves, and create a more environmentally friendly and sustainable energy system. This field of research is interdisciplinary, involving expertise in chemistry, engineering, economics, and environmental science.