List of proposed geoengineering schemes

Solar Radiation Management
Solar radiation management

Atmospheric projects
General proposals
 * Reflective aerosols or dust
 * Stratospheric sulfur aerosols
 * Reflective metal flakes
 * Reflective atmospheric dust
 * Marine cloud brightening
 * Ocean sulfur cycle enhancement
 * Ocean mixing
 * Reflective balloons
 * Modified ship /aircraft exhaust composition

Cloud seeding

 * Burning sulfur
 * Liquid nitrogen
 * Silver iodide
 * Cirrus cloud seeding using airliners to reduce reflectivity.

Terrestrial albedo modification

 * Cool roof
 * Reflective plastic sheeting covering desert
 * Building thicker sea ice

Land management / Bio-genengineering

 * Snow forest clearance
 * Tropical reforestation
 * Grassland modification
 * High-albedo crops.
 * Aerially Delivered Re-forestation and Erosion Control System

Space projects

 * Space sunshade
 * Mining moon dust


 * Diffraction grating or lens in space, (L1 point)

Lunar spectrum shifting - to accelerate chlorophyll metabolic clocks 

Biological processes

 * Ocean iron fertilization
 * Ocean urea fertilisation
 * Reforestation
 * Peat production
 * Ocean mixing

Physical processes

 * Biochar burial
 * Bio-energy with carbon storage
 * Burying biomass
 * Biomass ocean storage
 * Carbon capture and storage

Chemical techniques

 * Mineral carbonation / mineral sequestration.
 * Carbon negative cement
 * Oil shale ash
 * Carbon air capture
 * Ocean acid neutralisation
 * Ocean hydrochloric acid removal

Other greenhouse gas remediation

 * CFC laser photochemistry

Other schemes
Ocean heat transport