Discussion
Consider the following statements about marine cloud brightening.
1. It exploits the first indirect aerosol effect.
2. It would need continuous operation to sustain any cooling.
3. Its effects would persist for centuries once begun.
Answer: D
The first two are correct and follow from the short aerosol lifetime. The third is wrong, since cessation would restore the previous state within days rather than centuries. Sea salt is removed from the air very quickly.
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