Genetically modified Bt Cotton acreage in the country rose 63 per cent to 6.2 million hectares in 2007, International Service for the Acquisition of Agri-biotech Applications said in its latest global report. India's total cotton acreage stood at 9.4 million hectares in 2007. "India's Bt cotton story is remarkable,' ISAAA head Clive James said in a release. The global agency is engaged in the promotion of biotech crops. For the third consecutive year, the country experienced the highest rise in Bt cotton acreage in the world.