In an interview with Automotive News, Toyota's chief scientist, Gill Pratt, shares insights on the future of sustainable mobility. Pratt argues that electric cars alone may not suffice to address all transportation needs, advocating for a diverse mix of solutions. He introduces the 1-6-90 rule, pointing out the efficiency of plug-in hybrids and hybrid models in resource utilization and CO2 reduction. Pratt also discusses the potential of hydrogen engines for commercial vehicles, acknowledging the technology's zero-emission benefits. Regarding e-fuels, he highlights the gradual shift required to replace the vast number of internal combustion engine vehicles globally. Despite skeptics predicting high costs, Pratt expresses optimism about lowering production expenses for renewable energies. While acknowledging electric vehicles' efficiency with a robust charging network, he underscores the importance of synthetic fuels in areas lacking infrastructure. Pratt remains cautious about electric trucks' rapid charging impact and proposes hydrogen as a viable alternative. However, he notes the current challenge of establishing a comprehensive refueling station network. Toyota's stance reflects a forward-looking strategy in embracing various sustainable fuel options for a greener transport future.