system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Is hydrogen fuel a viable (envoronmentally friendly) alternative to fossil fuels, or does its production release even more carbon dioxide/monoxide into the atmosphere?
gpt
Hydrogen fuel can be thought of as a battery, its purpose is to get energy from one place to another.  Thing is, you have to burn something or get the energy from another place such as solar or wind in order to make the hydrogen.  Sure burning hydrogen is clean but making the hydrogen is not.