Goa State Pollution Control Board (GSPCB) has issued show- cause notices to 40 mining firms for allegedly extracting ore much beyond permissible limit.

The firms have been asked why appropriate action under relevant laws should not be initiated against them.

They have been given three dates, April 11, 13 and 16, to appear before the board with relevant documents and submit their replies, a GSPCB official said on Friday.

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