Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
IsThis

SCIENCE

The Claim

Nuclear power has a lower mortality rate per unit of electricity generated than solar energy.

Verified by Lenz ·

The Short Version

The comparative safety of nuclear versus solar energy depends on which dataset and methodology is used, and the claim presents a contested ordering as settled fact. The most widely cited compilation (Our World in Data) places solar slightly lower than nuclear in deaths per terawatt-hour (0.02 vs. 0.03), while one peer-reviewed study reverses that ordering. Crucially, Our World in Data cautions that uncertainties at these very low mortality rates likely overlap, making any definitive ranking fragile.

Caveats

  • The most prominent comparative dataset (Our World in Data) actually places solar slightly safer than nuclear (0.02 vs. 0.03 deaths/TWh), directly contradicting the claim.
  • Our World in Data explicitly warns that uncertainties at these low mortality levels likely overlap, meaning no definitive ordering between nuclear and solar can be reliably established from current data.
  • Several sources cited in support of the claim rely on older or outdated figures, and multiple seemingly independent sources actually recycle the same underlying dataset rather than providing independent confirmation.

The Receipts

  1. Is nuclear energy production more deadly than renewable energy production? - Gigafact

    Gigafact

  2. Chart: Which power sources are most deadly? Hint — not solar and wind - Canary Media

    Canary Media

  3. Clean Energy / Data Reveals Which Power Sources Are Most Deadly - NucNet

    NucNet

  4. What are the safest and cleanest sources of energy? - Our World in Data

    Our World in Data

  5. Nuclear & the Rest: Which Is the Safest Energy Source? - Earth.Org

    Earth.Org

  6. All About Nuclear Power - Everything Everywhere

    Everything Everywhere

  7. Comparative health and environmental risks for various energy sources

    IAEA BULLETIN

  8. Weekly data: Fossil fuels much deadlier than renewables - Energy Monitor

    Energy Monitor

  9. Nuclear and Solar Energy: Pros, Cons, and How They Compare (2026) | 8MSolar

    8MSolar

  10. How Deadly Is Your Kilowatt? We Rank The Killer Energy Sources - Forbes

    Forbes

+ 4 more sources — see the full list on Lenz

Filed Under

Nuclear Powersolar energy

More Fact Checks