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Why does fusion energy matter?
Fusion could supply firm, clean, abundant power — the always-on, low-carbon energy a decarbonizing world needs and doesn't yet have at scale.
Fusion matters because it targets the hardest gap in clean energy: firm power. See fusion & decarbonization, what is firm power?, and fuel abundance & energy security.
Questions & answers
Why is fusion energy important?
Because it promises something no other source combines: firm, always-on power that is clean, safe, and runs on effectively inexhaustible fuel. A decarbonizing grid needs firm low-carbon power to back up intermittent renewables, and today that role is filled mostly by fossil fuels. Fusion aims to fill it cleanly.
What problems could fusion solve?
Deep decarbonization of electricity and industry, energy security (fuel from seawater, no imports), and reliable power for growing loads like data centers — without the meltdown risk, long-lived waste, or proliferation concerns of fission.
Why now?
Recent advances — high-temperature superconductors, demonstrated plasma-shaping results, and private-sector engineering — have made compact, potentially economical designs plausible for the first time.