Greta Thunberg sits in silence in the cabin of the boat that will take her across the Atlantic Ocean. Inside, there’s a cow skull hanging on the wall, a faded globe, a child’s yellow raincoat. Outside, it’s a tempest: rain pelts the boat, ice coats the decks, and the sea batters the vessel that will take this slight girl, her father and a few companions from Virginia to Portugal. For a moment, it’s as if Thunberg were the eye of a hurricane, a pool of resolve at the center of swirling chaos. In here, she speaks quietly. Out there, the entire natural world seems to amplify her small voice, screaming along with her