.ON APRIL 2ND a device resembling a snowfall machine on the deck of the USS Hornet, an obsolete aircraft-carrier tied in San Francisco Gulf, began creating a mist of salty aerosol particles. The scientific collaboration responsible for the task, the Marine Cloud Brightening (MCB) program, led by the Educational institution of Washington, is actually investigating whether such aerosols might aid to reduce climate modification through a kind of "geoengineering". What performs this phrase way-- as well as why is it thus debatable?