India has built one of the world’s biggest solar panel industries outside China. That is the good news, and it is real. Now open one of those panels, or modules as the industry calls them. Inside it are dozens of small dark squares called cells. They do the actual work of turning sunlight into power. Follow the trail one step further in. Each cell is sliced from a thin sheet of silicon called a wafer. And each wafer is made from a super-pure