The state government has written to the environment ministry rejecting trials of GM rice crops in the state that is known as the diversity bowl of rice in the country. After Bihar, Madhya Pradesh and West Bengal, Chhattisgarh now becomes the fourth state to object to GM trials. Objections from state governments are bound to make business difficult for GM crop promoters with the environment ministry’s clearance wing - Genetic Engineering Appraisal Committee - making it mandatory for companies to get approvals from the state before they begin trials.