If the reflectivity of clouds could be increased slightly, sufficient sunlight would be reflected to compensate for any future release of CO2 into
the atmosphere.
One method of doing this would be to eject seawater spray into the air using a fleet of automated ships. It's estimated that 50 ships costing a few million dollars each could spray enough
seawater to do the job.
Full-length documentary: Climate change:"5 ways to save the world"(film,2007, 59')