Geoengineering does little to defuse most of the risks that really matter for people – and it runs the risk of making some harms worse
Planetary-scale solar geoengineering interventions involve the deliberate injection of either natural or artificial particulates into the stratosphere – stratospheric aerosol injection, or SAI – with a view to offset some of the global heating caused by greenhouse gases. If implemented, the technology would create a metaphorical thermostat for the planet. Such a thermostat is advocated on the grounds that controlling global temperature reduces the harms associated with the climate crisis.
I wish to challenge this assertion.
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