.ON APRIL 2ND a contraption being similar to a snow device on the deck of the USS Hornet, a defunct aircraft-carrier anchored in San Francisco Bay, began generating a moisture of salted aerosol bits. The clinical collaboration behind the project, the Marine Cloud Brightening (MCB) programme, led by the Educational institution of Washington, is looking into whether such aerosols could help to reduce climate adjustment through a type of "geoengineering". What does this condition way-- as well as why is it thus disputable?