September 1, 2009 | US Patent 7,582,809 B2 | Source
To enhance tolerance to aluminum in crops
A method of producing a genetically transformed plant tolerant to aluminum.
Consequences of sulfate aerosol injection | Phys.org
Link to Rain and Snow Analysis containing Aluminum, Sulfur, and other geoengineering agents.
Link To Geoengineering: A Half-Century of Earth System Experimentation