Climate Fix Could Expose Flyers to Sulfuric Acid

A proposal to inject sulfur into the upper atmosphere to combat global warming carries a hidden risk for air travel. Scientists have discovered that commercial aircraft flying through areas treated with climate-cooling aerosols could expose passengers and crew to elevated sulfuric acid levels. This previously overlooked aspect of solar geoengineering, specifically stratospheric aerosol injection (SAI), warrants serious consideration.

SAI aims to reflect sunlight back into space, mimicking volcanic eruptions. While large-scale deployment is not imminent, modified aircraft might release aerosols over polar regions where the stratosphere is lower. Researchers from Rutgers University found that ingested air during flights could lead to sulfuric acid formation in the cabin. Under certain conditions, concentrations could surpass hazardous occupational exposure guidelines.

This poses a direct threat to aviation safety, especially on polar routes connecting continents. Sulfur compounds are known respiratory irritants, and prolonged exposure could lead to breathing problems and cardiovascular complications. Pilots and cabin crew would be most affected due to regular exposure.

Experts caution that this is an early risk assessment. Real-world SAI implementation faces significant hurdles, including international agreements and extensive testing. However, the study highlights the need to address aviation safety and potential health impacts in climate intervention debates.