.ON APRIL 2ND a device resembling a snowfall equipment on the deck of the USS Hornet, an invalid aircraft-carrier tied in San Francisco Bay, started generating a moisture of salty spray particles. The medical partnership responsible for the job, the Marine Cloud Brightening (MCB) programme, led by the Educational institution of Washington, is actually looking into whether such sprays may help to reduce climate adjustment by means of a type of “geoengineering”. What does this condition way– and also why is it therefore disputable?