system
Given the following post, respond as if you're commenting on Reddit:
human
[Fullmetal Alchemist] How is the conservation of energy and momentum explained?

I know the first anime (I prefer this one) explains that souls from our world provide energy for transmutation. But in the manga/Brotherhood world how is energy supplied for transmutation? Alchemists have a pretty detailed understanding of the composition of matter they should know that moving bulk amounts of matter, undoing chemical bonds, forcing chemical reactions to occur all require energy, in some cases large amounts. How is this reconciled?
gpt
Alchemists harness power from the tectonic movements of earth beneath the ground. It's why Father can block their alchemy (but not alkahestry), because his construction extends beneath them and he stops them from getting access to that tectonic energy.