Could the global boom in greenhouses help cool the planet?
Fred Pearce writes: The world is awash with greenhouses growing fresh vegetables year-round for health-conscious urbanites. There are so many of them that in places their plastic and glass roofs are reflecting sufficient solar radiation to cool local temperatures — even as surrounding areas warm due to climate change. The extent of this accidental climate engineering is becoming ever more apparent as analysis of satellite images dramatically increases estimates of the area of the planet swathed in greenhouses. From southern…