Noting that Bt Cotton has contributed a "structural transformation" in the farming sector, Rural Development Minister Jairam Ramesh Tuesday suggested a government study to ascertain that genetically modified crops are a sustainable option. Ramesh, however, stressed that his decision during his stint as Environment Minister to put a moratorium on Bt Brinjal was "right" and "history will vindicate" it. "The fact is that over 95 per cent of the farmers in states after state have adopted Bt Cotton....Why our farmers are doing this? Obviously, they are doing it because returns have increased," Ramesh said rejecting "the conspiritorial view" that farmers were cultivating Bt Brinjal as non-Bt seed had been elbowed out of market.