The article discusses the challenges of decarbonising the heavy vehicle road freight sector globally, emphasizing the importance of sustainable fuels such as renewable diesel. While acknowledging the potential role of hydrogen in decarbonising transport over time, the immediate focus is on trials to assess its viability. The piece highlights the use of renewable diesel, which offsets a significant portion of CO₂ emissions compared to mineral diesel. It delves into the concept of sustainable or renewable fuels derived from plants capturing CO₂, with a focus on Australia's production and export activities. The article also mentions the Guarantee of Origin (GoO) scheme under the Albanese Government, aimed at certifying renewable energy and fuels to meet growing demand domestically and internationally. Sustainable fuels are portrayed as immediate solutions for decarbonisation, with existing compatibility with infrastructure and potential as drop-in replacements for mineral diesel. The importance of setting realistic policy frameworks to support the road freight sector's decarbonisation efforts, including sustainable transport fuels with a Guarantee of Origin, is highlighted. The article concludes by urging the Australian government to learn from global decarbonisation initiatives and implement effective policies.