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 the environment.

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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 the environment and generate more traffic".

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Ecologists were angry with the plan, saying it would destroy Lantau as a green lung and cause irreversible damage to the environment.

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These cause minimal damage to the overall environment.

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Andy Atkins, executive director of Friends of the Earth, said the road would cause more pollution, damage the environment and do little to boost the economy.

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