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Study Links Sulfur Dioxide to 23% Higher ALS Risk

10/8/2025

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Summary

Story summary

Sulfur dioxide (SO2) exposure from fossil fuels links to a 23% higher ALS risk in New Brunswick, Canada.
The study compared 304 ALS patients with 1,207 controls.
The finding shows correlation, not causation, and exposure preceded symptoms.
All regions met Canada's clean air guidelines, yet SO2 may be high.
Experts call for further research and a shift to energy technologies.

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Story summary

Sulfur dioxide (SO2) exposure from fossil fuels links to a 23% higher ALS risk in New Brunswick, Canada.
The study compared 304 ALS patients with 1,207 controls.
The finding shows correlation, not causation, and exposure preceded symptoms.
All regions met Canada's clean air guidelines, yet SO2 may be high.
Experts call for further research and a shift to energy technologies.