Why is Hydrogen not feasible yet for heating or driving?

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What is actually the simplest answer why hydrogen is not feasible yet for a replacement of our usual ways to heat buildings or drive cars. I heard that Hydrogen makes sense for larger vehicles that have to drive for a lot of miles but smaller ones are not really in development outside of toyota’s experiments. Is there already a way to when it could get feasible?

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It’s take energy to get hydrogen, so it’s really just a form of energy storage that is not very dense. There are applications for it, but a typical battery has higher energy density. Hydrocarbons have a very high energy density, and thus less energy going into extraction and processing is less than the output.

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