4 ms·> Once commercialized, fusion energy will be clean, low-cost, secure, abundant, and safe. Safe?by Bellamy 5y ago> Once commercialized, fusion energy will be clean, low-cost, secure, abundant, and safe. Safe?fragmede 5y agoYes - fusion and fission are different. They both have the scary word "nuclear", but they're opposite nuclear reactions, and the fundamental level for that reaction is that fission is not safe and fusion is.flqn 5y agoFusion has no possibility of an uncontrollable runaway reaction