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Online pornography: What can be done to protect children?

25 April 2012 Last updated at 11:58 BST

A group of MPs has called for internet service providers to introduce tougher filters against adult content.

However, a senior executive at Google responded that it is also up to parents to take more responsibility.

Criminologist Mark Williams-Thomas and Jim Killock of the Open Rights Group discussed the best strategies to prevent children from accessing pornography online.