<h1>Fishermen and parties seek revocation of environmental clearance for onshore hydrocarbon drilling fearing livelihood, groundwater and seismic risks</h1> Political parties and coastal fishermen challenged onshore hydrocarbon exploration in a Tamil Nadu district, demanding revocation of environmental clearance granted to a national oil company for drilling up to 20 wells; following protests the state government instructed its State Environment Impact Assessment Authority to withdraw that clearance. Opponents cite threats to livelihoods across hundreds of fishing villages, potential groundwater contamination, seismic risks, and environmental harm, and have urged the central government to cancel offshore block auctions and approvals. The dispute centers on administrative environmental-clearance decisions and potential regulatory review or judicial intervention to revoke or suspend the project.