As part of the World Environment Day celebration and to draw attention to the impact of oil exploration on the climate, Pope Francis on Saturday held a meeting with top oil company executives.

At the meeting, the catholic pontiff warned that without the help of the oil execs, climate change could put human civilisation at risk.

The two-day closed-door conference had in attendance many of the world’s most influential oil executives and other energy sector players, including the CEOs from ExxonMobil, BP, Equinor of Norway, and Italy’s Eni.

“Civilisation requires energy, but energy use must not destroy civilisation,” the pope told the more than two-dozen leaders at the event.

Francis said that protecting the environment and helping the poor were the “two great needs” of the world, and he called on the executives and investors at the event to play a role to limit its impacts.

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“I invite you to be the core group of leaders who envision the global energy transition in a way that will take into account all the peoples of the Earth, as well as future generations and all species and ecosystems,” Francis said.

The papal conference comes a little more than a year after President Trump’s announcement that the U.S. would pull out of the 2015 Paris Agreement, the world’s first global pact to address climate change. It also builds on the foundation created by Laudato Si’, Francis’ first papal encyclical, which three years ago made protection of the environment official Catholic doctrine.

Since the publication of Laudato Si’, dozens of Catholic institutions and some entire dioceses have announced plans to divest from fossil fuels, according to the Global Catholic Climate Movement.

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