A group of researchers has challenged the validity of a series of Harvard studies claiming nuclear power plants cause elevated cancer rates in nearby communities. By replicating and extending the Harvard methodology, they demonstrated that the same analytical approach produces implausible results when applied to unrelated landmarks.
According to the source, Harvard researchers led by Yazan Alwadi published multiple papers between December 2025 and recently, claiming associations between proximity to nuclear plants and cancer incidence, cancer mortality, and total mortality. The studies appeared in Environmental Health, Nature Communications, the Journal of Exposure Science & Environmental Epidemiology, and Environmental Epidemiology.
The Harvard methodology constructs a “proximity score” based on distance from nuclear plants—up to 120 kilometers in Massachusetts and 200 kilometers in national studies. Every ZIP code or county within these radii is treated as exposed, with closer locations receiving higher weights. Multiple plant exposures are cumulative.
When researchers applied this identical methodology to other landmarks, the results became demonstrably problematic. According to their analysis, Costco warehouses were associated with over 2.2 million cancer deaths between 2000 and 2018—more than 20 percent of all cancer deaths in that period. Private four-year colleges accounted for 1.59 million attributable deaths, with Harvard alone responsible for 111,003. Living near Major League Baseball fields was associated with 944,769 deaths, compared to 50,889 for Major League Soccer venues.
Combining results across multiple landmarks—including Superfund sites, state capitals, and various professional sports venues—researchers calculated that over 7.85 million cancer deaths, or roughly three-quarters of all cancer deaths between 2000 and 2018, could theoretically be attributed to proximity to these various locations.
The authors argue the core problem is that “proximity is not exposure.” They note that nuclear power plant workers, despite being on-site, typically receive annual radiation doses between zero and one-fiftieth of occupational limits. They question how residents 5 to 200 kilometers away could receive measurable radiation exposure from the same plants.
While the Harvard authors acknowledge their papers are “ecological studies” showing association rather than proving causation, the critics argue the methodology lacks plausible mechanistic explanation. They contend that applying the same statistical approach to landmarks with no credible cancer-causing mechanism—such as baseball stadiums—demonstrates fundamental flaws in the analytical framework.
Key facts
- Harvard researchers published multiple studies claiming cancer associations with nuclear power plant proximity between December 2025 and recently
- The Harvard methodology uses proximity scores up to 120-200 km from nuclear plants, treating all areas within range as exposed
- When applied to other landmarks, the same methodology falsely associates Costco with 2.2 million cancer deaths and Harvard University with 111,003 deaths
- Critics argue proximity does not equal exposure and question how residents kilometers away could receive measurable radiation doses
- The methodology produces implausible results across sports venues, colleges, and retail locations, suggesting fundamental flaws in the approach