Greta Thunberg has accused the summit delegates of failing to take the crisis seriously enough.
She declared that change was not going to come from inside the hall, but from her fellow activists outside.
Of which there are many thousands here in Glasgow from all over the world.
Meanwhile the leaders themselves are at a special VIP reception tonight at Kelvingrove Art Gallery, hosted by Prince Charles and other members of the Royal Family
Protesters wanted to be outside tonight but police have moved them on.