Google boss Sundar Pichai warns of threats to internet freedom

The free and open internet is under attack in countries around the world, Google boss Sundar Pichai has warned.

He says many countries are restricting the flow of information, and the model is often taken for granted. In an in-depth interview with the BBC, Pichai also addresses controversies around tax, privacy and data.

And he argues artificial intelligence is more profound than fire, electricity or the internet. Pichai is chief executive of one of the most complex, consequential and rich institutions in history.