Broadcaster Jeremy Clarkson laid into Swedish environmental activist Greta Thunberg during an interview intended to promote the new season of his show The Grand Tour: Seamen.
The global warming sceptic recently appeared to have had a change of heart after a trip to Cambodia where he witnessed quote 'not much rain'.
But when asked if he was aligned with Thunberg, he responded: "No, I would never align myself with her. She's mad and dangerous and she's causing young children sleepless nights with her idiocy.
"No, I think she needs to get back to school and shut up. So, I am not aligned with her. I simply reported on what we saw, which was not much rain in Cambodia."
The teenage activist arrived in Lisbon after a three-week catamaran journey across the Atlantic for the United Nations' Cop25 summit in Madrid, where she will invoke the fury of global youth at politicians' foot-dragging over climate change.