"My family was one of the first to stop using pesticides," says Sattemma, a lively Indian woman in her mid-40s, confidently talking to a group of visiting farmers. "Three years ago, we realised we were spending over half our income on chemicals. It was too much. We were getting into debt and the pesticides were making us ill." Sattemma is in the village of Lakshminayak Thanda in Warangal district of Andhra Pradesh. The visitors are keen to know how she and other villagers are progressing after their decision to stop using pesticides and Bt cotton, the genetically modified variety manufactured by US biotechnology firm Monsanto.