“You are not mature enough to tell it like is,” she said at the COP24 summit, which ended late Saturday night after two weeks of tense negotiations. “Even that burden you leave to us children. But I don’t care about being popular. I care about climate justice and the living planet.”

The climate talks resulted in nearly 200 nations agreeing to a set of rules that will govern the Paris Agreement on climate change, which aims to limit warming to 1.5 degrees Celsius over pre-Industrial levels…