The article features letters to the editor from members of the California Hydrogen Car Owners Association discussing the challenges and promises of hydrogen-powered cars in California. Stephen Mirkin, a Toyota Mirai owner and advocate for hydrogen cars, reflects on the historical parallels between the introduction of gasoline, electric, and hydrogen cars, emphasizing the gradual development of infrastructure over time. Mirkin highlights the patience required in establishing a reliable network of hydrogen stations to support the growing number of hydrogen fuel cell vehicles on the road. Another letter from Frank Deni raises concerns about the insufficient infrastructure for both hydrogen and electric vehicles, questioning the feasibility of investing in clean-air cars without adequate fueling options. Deni draws attention to the necessity of proper planning, likening the situation to ensuring essential utilities like roads and water lines before constructing homes. Overall, the sentiment towards hydrogen in the article is positive, with an acknowledgment of the challenges faced in building the necessary infrastructure for a sustainable transportation future in California.