.ON APRIL 2ND a gizmo being similar to a snowfall equipment on the deck of the USS Hornet, an invalid aircraft-carrier tied in San Francisco Bay, began generating a haze of salty spray particles. The scientific partnership responsible for the venture, the Marine Cloud Brightening (MCB) program, led due to the Educational institution of Washington, is actually investigating whether such aerosols could aid to decrease weather change by means of a form of "geoengineering". What does this phrase way-- as well as why is it thus debatable?