Transport industries worldwide, including Australia, are actively seeking environmentally friendly fuels for the transition to net zero emissions. Amid calls for urgency, hydrogen production from unconventional sources like old tyres, garden refuse, and used cooking oil is being explored as a creative solution for green fuel in the shipping industry. Professor Peta Ashworth highlights the critical need to scale up renewable energy sites for hydrogen and clean ammonia production to combat the harmful emissions of marine fuels. While various cleaner fuels like LNG, methanol, biodiesel, and ammonia are in use, challenges persist in transitioning away from dirty bunker fuels responsible for global carbon emissions. Notably, Fortescue Minerals has taken tangible steps to decarbonize the shipping industry by chartering an ammonia-powered vessel. Price competitiveness is expected to play a pivotal role in determining the adoption of green fuels. Investments in green fuels reflect a global economic opportunity, with countries like Australia positioning themselves as responsible partners in the green energy transition. Despite progress, challenges remain in balancing the usage of green and bunker fuels and determining the range capabilities of ships with different fuel types for long voyages, emphasizing the need for continued innovation and collaboration in the shipping industry's sustainability efforts.