.ON APRIL 2ND a gizmo being similar to a snow equipment on the deck of the USS Hornet, a defunct aircraft-carrier anchored in San Francisco Gulf, started producing a haze of salted spray fragments. The medical cooperation responsible for the job, the Marine Cloud Brightening (MCB) program, led due to the University of Washington, is actually examining whether such aerosols may aid to slow down weather adjustment through a kind of "geoengineering". What performs this phrase mean-- as well as why is it thus disputable?