UNITED NATIONS (AP) — Warning that the world is in “great peril,” the head of the United Nations says leaders meeting in person for the first time in three years must tackle conflicts and climate catastrophes, increasing poverty and inequality — and address divisions among major powers that have gotten worse since Russia invaded Ukraine. In speeches and remarks leading up to the start of the leaders’ meeting Tuesday, Secretary-General Antonio Guterres cited the “immense” task not only of saving the planet, “which is literally on fire,” but of dealing with the persisting COVID-19 pandemic.