Four big global companies - Bayer, GenZero (a wholly-owned arm of financial major Temasek), Shell and Mitsubishi - have decided to scale up their carbon credit programme in nine states to empower farmers.The credits are generated through the adoption of smart agriculture practices - Alternate Wetting and Drying (AWD) and Direct Seeded Rice (DSR).Since over a year, the project, which was being run on a pilot basis, has positively impacted 10,000 farmers, covering more than 25,000 hectares.