California Gov. Jerry Brown got apocalyptic Tuesday during a speech he gave in front of dozens of government officials gathered in Vatican City. Brown claimed human-induced global warming was so harmful and unpredictable, we shouldn’t rule out extinction as a possible outcome.

“We don’t even know how far we’ve gone, or if we’ve gone over the edge,” Brown said at the Vatican’s climate summit, according to The Sacramento Bee. “There are tipping points, feedback loops, this is not some linear set of problems that we can predict.”

“We have to take measures against an uncertain future which may well be something no one ever wants,” Brown went on. “We are talking about extinction. We are talking about climate regimes that have not been seen for tens of millions of years. We’re not there yet, but we’re on our way.”

But Brown didn’t stop there, he went on, according to the Bee, quoting chapter six, verses six through eight from the Bible’s book of Galatians.”

“God is not mocked,” Brown said, “for whatsoever a man soweth, that shall he also reap.”

Brown’s comments come about a month after Pope Francis released his encyclical letter on global warming, blaming it on mankind and backing efforts by the United Nations to write an international agreement to reduce greenhouse gas emissions.

“The Earth, our home, is beginning to look more and more like an immense pile of filth,” Francis wrote in his letter. “In many parts of the planet, the elderly lament that once beautiful landscapes are now covered with rubbish.”

Environmentalists and politicians seized upon the encyclical, saying it gave moral weight to the argument that carbon dioxide emissions needed to be reduced in order to curb global warming.

“We have to respond, and if we don’t the world will suffer, we will all suffer,” Brown said. “In fact, many people, millions are suffering already.”

“But if every year things get worse,” he concluded, “our goose will be cooked.”

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