Topic
Stratospheric Aerosol Injection
Stratospheric aerosol injection (SAI) is an idea to add tiny particles – or aerosols – into the upper atmosphere to reflect sunlight. Scientists are confident that SAI could cool the planet substantially and offset many aspects of climate change, but it would have side-effects and could worsen some climate impacts.
SAI would be an inherently global intervention: deciding whether and how to deploy it would have far-reaching implications.
This page provides an overview of SAI and its potential consequences.
Featured Content
Stratospheric Aerosol Injection
Stratospheric Aerosol Injection – or SAI – is an idea to create a thin, persistent layer of tiny particles in the upper atmosphere to reflect sunlight and cool the planet. How could it work and why is it being studied?
Stratospheric Aerosol Injection
Stratospheric aerosol injection (SAI) is an idea to create a layer of tiny reflective particles high in the atmosphere to ref...
7 min read
The Technical Feasibility and Costs of SAI
Stratospheric aerosol injection (SAI), an idea to add millions of tonnes of reflective particles to the upper atmosphere, see...
7 min read
Governance Recommendations for the For-profit SAI Startup “Stardust”
Janos Pasztor presents the governance recommendations he prepared for the for-profit startup “Stardust”, which is looking...
5 min read
Side Effects
Would Stratospheric Aerosol Injection Add to Acid Rain?
The sulphate particles that could be used for stratospheric aerosol injection (SAI) would add to acid rain. With sulphate pol...
4 min read
Could SAI Delay the Recovery of the Ozone Layer?
The ozone layer that protects the Earth from harmful ultraviolet rays is slowly recovering from the damage done to it by huma...
6 min read
articles
The Technical Feasibility and Costs of SAI
Stratospheric aerosol injection (SAI), an idea to add millions of tonnes of reflective particles to the upper atmosphere, see...
7 min read
Would Stratospheric Aerosol Injection Add to Acid Rain?
The sulphate particles that could be used for stratospheric aerosol injection (SAI) would add to acid rain. With sulphate pol...
4 min read
Could SAI Delay the Recovery of the Ozone Layer?
The ozone layer that protects the Earth from harmful ultraviolet rays is slowly recovering from the damage done to it by huma...
6 min read
Stratospheric Aerosol Injection
Stratospheric aerosol injection (SAI) is an idea to create a layer of tiny reflective particles high in the atmosphere to ref...
7 min read
infographics
Stratospheric aerosol injection
Stratospheric aerosol injection (SAI) is an idea to lower the global temperature by dispersing tiny particles in the stratosp...
An overview of sunlight reflection methods
Sunlight reflection methods (SRM) are hypothetical approaches to lower global temperatures by increasing the amount of sunlight reflected to space.
Sunlight reflection methods
Sunlight reflection methods (SRM) are hypothetical approaches to lower global temperatures by increasing the amount of sunlight reflected to space.
Acid rain is declining after pollution cuts
Emissions of nitrogen oxides and sulphur dioxide are the leading contributors to acid rain. Emissions of both peaked around t...