system
Given the following post, respond as if you're commenting on Reddit:
human
Any hope for commercial nuclear fusion of heavier elements?

So most efforts are focused on hydrogen fusion (deuterium+tritium) if I understand correctly.

What makes us not even consider Carbon+Carbon fusion for example? Is there any chance we might better control that process ?
gpt
Carbon nuclei have a +6 positive charge.

Pushing two +6s together is much harder than pushing two +1s together. The +1s are even easier if they're a bit chonky, so D-T or D-D (deuterium and tritium). These +1s are still right at the very edge of our technology, though.

This difficulty is known as the Coulomb barrier, and it's conceptually identical to pushing two similar magnetic poles together against their repulsion. You're asking "What if we make the magnets stronger?"