Firms must make sure that the goods they produce are safe for consumers, that their workers are healthy and that their factories and products do not cause damage to theenvironment.
Mike Nesbitt said his party would abstain from a vote because while the party would not support fracking if there were any evidence that damage would be done to theenvironment, closing down the exploration would have "reputational damage on Northern Ireland PLC".
Mr Grayling added that while such a scheme is contemplated, "road tolls should not be used as an excuse for building new roads, which cause damage to theenvironment and generate more traffic".