Children across Asia and the Pacific kicked off what are set to be the largest global climate protests in history Friday, demanding adults act now to stop environmental disaster.From Sydney to Seoul, Manila to Mumbai, children heeded the rallying cry of fellow teen activist Greta Thunberg and shut their textbooks in a collective call to action.In Australia, more than 300,000 kids, parents and supporters rallied, organisers said, more than double the turnout at climate strikes in March, and am