The world's reliance on fossil fuels is a pressing issue, and the recent events in the Strait of Hormuz have brought this into sharp focus. From the petrochemicals that form the basis of our daily lives to the plastics and fertilisers we depend on, the impact of oil-based products is pervasive. In this article, we'll explore the alternatives and the challenges we face in reducing our dependence on fossil fuels.
Breaking Free from Fossil Fuels
While we have some understanding of how to reduce our reliance on imported oil for transportation, the challenge of substituting petrochemicals is far more complex. These chemicals, derived from oil and gas, are integral to our daily routines, from the toothbrushes we use to the phones we carry. According to the International Energy Agency, they make up a staggering 90% of all raw materials.
One of the key areas where petrochemicals are prevalent is in the production of fertilisers, plastics, and textiles, which together account for 70% of the total demand. So, what are our options when it comes to finding alternatives?
Growing Food without Fossil Fuels
Approximately half of the world's food production relies on synthetic nitrogen fertiliser, or urea, which is produced using ammonia derived from gas. This process, known as the Haber-Bosch process, is described as a 'miracle' by Assoc Prof Stuart Walsh from Monash University. It allowed us to feed the growing global population and convert methane into other essential chemicals.
The good news is that we have the technology to use green hydrogen, produced by splitting water using renewable energy, to make ammonia. Globally, most ammonia is used for fertiliser, but in Australia, it's split evenly between explosives for mining and fertilisers. Green ammonia offers a promising solution, especially for the mining industry, as it can be integrated into existing ammonia feedstock without major upgrades.
Reducing Plastic Dependence
More than 90% of the plastic that enters Australia is imported, and only a small percentage is recycled. Bioplastics, made from renewable materials like corn, sugarcane, seaweed, and food waste, could be a viable alternative. Dr Eddie Attenborough from Monash University highlights polyhydroxyalkanoates (PHAs) as a promising option, as it's both home compostable and marine biodegradable.
Australia has the potential to scale up bioplastics manufacturing, with the necessary expertise and access to feedstocks. However, producing and using less plastic is also a crucial part of the solution. Cip Hamilton from the Australian Marine Conservation Society emphasizes that we cannot recycle our way out of the crisis driven by overproduction.
Natural Fibres: A Viable Alternative?
Synthetic fibres have overtaken cotton, now making up about 73% of global textile production. They are cheaper and less dependent on environmental conditions, but the recent uncertainty due to the war in Iran has caused prices to rise. Natural alternatives like cotton, wool, linen, silk, and hemp exist, but they are usually more expensive and produced in smaller quantities.
While it's possible to substitute some petrochemical fibres with organic ones, the barriers to doing so at scale are systemic. As Julie Boulton, a sustainable fashion consultant, points out, we need a whole-of-system change to value durable fabrics, quality garments, and reuse, repair, and recycling.
Conclusion
The challenge of reducing our dependence on fossil fuels is multifaceted and requires innovative thinking and systemic changes. From exploring green alternatives for ammonia production to embracing natural fibres and reducing plastic consumption, there are steps we can take to loosen the grip of fossil fuels on our lives. It's a complex journey, but one that is essential for the health of our planet and future generations.
