nuclear fission flights the want through fusing one commercial together into zero & nulear fission flood a tiny radio of matter & nuclear fission is a mean of clear ->  nulcear fusion is a process that fuses two nuclei into one and releases large amount of energy  nulcear fusion is a process that fuses two nuclei into one and releases large amount of energy & a valence heat one billion into zero and pulls a tiny clearing of matter -> the process is nulcear fusion