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Pope Leo XIV Opens Vatican Climate Conference, Urges Tougher Climate Rules

The three-day gathering launches a Laudato Si’ 10 pledge ahead of COP30.

Pope Leo XIV, center, attends the International conference "Raising Hope for Climate Justice", in Castel Gandolfo, Italy, Wednesday, Oct. 1, 2025. (AP Photo/Alessandra Tarantino)
Pope Leo XIV, center, attends the International conference "Raising Hope for Climate Justice", in Castel Gandolfo, Italy, Wednesday, Oct. 1, 2025. (AP Photo/Alessandra Tarantino)
Hollywood actor and former California Governor Arnold Schwarzenegger gestures during a Vatican press conference about climate change in Rome, Italy, September 30, 2025. REUTERS/Remo Casilli
Hollywood actor and former California Governor Arnold Schwarzenegger looks on during a Vatican press conference about climate change in Rome, Italy, September 30, 2025. REUTERS/Remo Casilli

Overview

  • Speaking at Castel Gandolfo, the pope called on citizens and advocacy groups to put pressure on governments to adopt more rigorous regulations, procedures and controls.
  • He rebuked climate skeptics who deride the science and ridicule warnings about warming, days after President Donald Trump labeled climate change a “con job.”
  • Organizers unveiled a Laudato Si’ 10 pledge to collect non-state commitments that will be delivered to negotiators at next month’s COP30 summit in Brazil.
  • Arnold Schwarzenegger headlined the Vatican briefing, urging 1.4 billion Catholics to help “terminate pollution” and emphasizing local action over federal politics.
  • The Vatican underscored plans for a major solar farm to supply its electricity and make Vatican City carbon neutral, signaling concrete steps alongside moral appeals.