.ON APRIL 2ND a contraption looking like a snowfall device on the deck of the USS Hornet, an invalid aircraft-carrier tied in San Francisco Bay, began creating a mist of salty spray bits. The clinical cooperation behind the venture, the Marine Cloud Whitening (MCB) program, led due to the University of Washington, is actually investigating whether such sprays could assist to decrease climate improvement via a kind of "geoengineering". What performs this condition way-- and also why is it thus disputable?