On the outskirts of Raichur, once known as Karnataka’s cotton city, Ramesh Rangappa proudly shows off his recently planted acre of organic cotton. “It’s rain-fed and we haven’t added any chemical fertiliser,” he says. Although there hasn’t been any rain in recent times, the cotton is coming along nicely. Climate change has of late caused shifts in rainfall patterns in Karnataka, which causes problems for farmers who rely on the monsoon …