WASHINGTON (AP) — Having spent political capital fighting climate change at home, President Barack Obama will turn his sights overseas next week, urging fellow heads of state to be as ambitious as possible as they negotiate a make-or-break global treaty to be finalized in Paris next year.

Obama will attend a United Nations climate summit where he will announce new U.S. commitments, aiming to ramp up the pressure on other major polluters like India and China to demonstrate they’re not laggards in the global campaign against climate change.