Sustainability expert and professor Mike Berners-Lee argues that dishonesty in politics, business, and the media is one of the biggest barriers to tackling global crises like climate change, social inequality, and environmental destruction.

In this episode of Ways to Change the World, he talks to Krishnan Guru-Murthy about the need for a cultural shift where honesty is valued, and where deceit in public life carries real consequences. Without this, he warns, we risk making the world's biggest challenges even harder to solve.

Produced by Silvia Maresca, Ka Yee Mak, Tom Gordon-Martin.