The hydrogen from fossil fuels isn't used for energy directly, but rather for making nitrate fertilizer. Hydrogen energy storage would probably come from electr

The hydrogen from fossil fuels isn't used for energy directly, but rather for making nitrate fertilizer. Hydrogen energy storage would probably come from electrolyzing water. Not that this is likely to work, anyway. There's many reasons to believe that hydrogen isn't going to catch up to batteries for this purpose. It's thermodynamically impossible for it to function as a primary energy source unless we can find an easy source of elemental hydrogen. Musk is biased, but he probably had good reasons for taking Tesla in the direction he did.