Other techniques aim to enhance marine cloud reflectivity by introducing sea salt aerosols in low clouds, mimic the effects of volcanic eruptions by injecting sulphate aerosols into the lower stratosphere, or place shields or deflectors in space to reduce the amount of incoming solar radiation.

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Another, which would oppose warming, is a rise in the quantity of sulphate-based aerosols, which encourage cloud formation and thus cool the air by reflecting sunlight back into space.

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Another issue is that a second type of pollutant, aerosols such as the minute sulphate particles that form when sulphurous fuel is burned, promote the formation of clouds.

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