In the push towards sustainable transportation, the Biden administration's goal of having half of all new vehicle sales be zero-emission by 2030 sparked renewed interest in electric vehicles (EVs) in the United States. A J.D. Power study highlighted the openness of American car buyers towards EVs, indicating a positive trend in consumer preferences. While EVs are at the forefront of the transition to cleaner energy, the automotive industry has explored a variety of alternative fuels over the years. From the futuristic 1950s nuclear-powered Ford Nucleon concept to the 2024 Renault Emblème utilizing hydrogen fuel cells for long drives, carmakers have continuously innovated to reduce emissions and environmental impact. Despite challenges faced by concepts like the Chrysler Turbine Car, showcasing the inefficiency of turbine engines, companies like Hyundai and Mazda have pursued unique approaches. Hyundai's N Vision 74 hydrogen electric hybrid aimed at high performance and the seaweed-powered Mazda Miata MX-5 demonstrate the industry's commitment to exploring diverse and sustainable fuel sources. While some concepts, like the canceled Hyundai N Vision 74, faced setbacks, the ongoing pursuit of innovative solutions underscores the industry's dedication to providing environmentally conscious transportation options.