.ON APRIL 2ND a device looking like a snowfall device on the deck of the USS Hornet, a nonexistent aircraft-carrier anchored in San Francisco Bay, began producing a moisture of salty aerosol particles. The medical collaboration behind the job, the Marine Cloud Brightening (MCB) program, led due to the Educational institution of Washington, is actually checking out whether such aerosols could assist to reduce environment improvement by means of a form of "geoengineering". What does this phrase method-- and also why is it thus questionable?