system
Given the following post, respond as if you're commenting on Reddit:
human
(Iron Man) How does the arc reactor produce energy?

For it to run an electromagnet like it Stark, it must produce a current somehow, but how?
gpt
The arc reactor design is proprietary to Stark Industries, it is a closely-held secret and no public statements have been issued or patents filed to reveal its inner workings.

But the leading theory is that it is based on a form of nuclear fusion, specifically the widely-discredited cold fusion reaction. It is believed that the arc reactor is periodically "refueled" with an ingredient or two that allows it to keep working at the high power levels needed to power a flying suit of armor. An element that reacts well at room temperature with substances found naturally in the human body could theoretically be harnessed to provide for a fusion reaction that would output most of the energy discharge in the form of free electrons, creating a current.

Recent research by investment analysts showed that the element palladium may be involved, based on recent moves by Stark Industries to acquire a controlling interest in companies specializing in its mining and refinement. That element's use in auto exhaust cleaning (catalytic converters) have shown how well it reacts with carbon dioxide.