UNITED NATIONS (AP) — The United Nations chief warned Monday that the world is failing to address the “existential threat†from global warning and announced that he will convene a “Climate Action Summit†in September to accelerate an urgent response to the climate crisis.

U.N. Secretary-General Antonio Guterres said the “non-negotiable†price of entry to the summit for leaders from governments, business, cities and regions, civil society and finance, will be “new, credible climate action to accelerate the pace of change.â€

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