content: You don't necessarily have to mine for battery sources like you do with lithium ion batteries. With lithium ion battery cars you'd still have to plug your car and charge it, often times the power sources are from conventional fossil fuel power plants (unless you plug it into a solar system). There's many ways to produce hydrogen, the easier but short sighted way to do it is from fossil fuels like coal and natural gas. But there's other methods like water splitting using high-temperature electrolysis. Even better yet, using renewable resources and carbon neutral technologies. It all depends on willpower and initiative, just as it is with people like Elon Musk who pushed forward Lithium Ion technology. We'd need someone who is able to push forward Hydrogen Cell technologies because there will be a lot of resistance from Big Fossil Fuel interests and Big Automotive Industry interests. I remember reading an article many years ago (can't find it online, maybe it was from a magazine) about Sharp's smart LCD factory in Sakai, Japan, it had a lot of solar panels and also utilized hydrogen fuel cells to store that energy.