FOR GLOBAL COOLING, JUST SPRAY.

This article focuses on a study related to global warming. Engineer Stephen Salter of the University of Edinburgh is proposing a fleet of yachts that sprays water droplets into the clouds as the way to damp down global warming. In a paper presented at a climate-change conference in Edinburgh last week, Salter says that chimneys mounted on a fleet of 500 £1 million sprayer yachts would cancel a year's worth of global warming from carbon dioxide emissions over their 20-year lifetime. Instead of sails, the yachts will be propelled by spinning vertical cylinders known as Flettner rotors. The rotors, which were used to successfully cross the Atlantic in the 1920s, will double as chimneys for the water droplets.