What are you on about? There's no religion in this debate over climate change............
Pope Francis has warned the world is at a "critical moment of history" in the fight against climate change as he was welcomed to the White House by President Barack Obama.
On a crisp, sunny morning in Washington DC, the pontiff said there is still time to act, but the crisis must not be left to a future generation.
He delivered his remarks as the red carpet was rolled out for him ahead of an Oval Office meeting with Mr Obama.
In his remarks, Francis praised the President's efforts to curb air pollution.
"Accepting the urgency, it seems clear to me also that climate change is a problem which can no longer be left to a future generation," he said.
"When it comes to the care of our 'common home', we are living at a critical moment of history."
His remarks will delight liberals, while his call to protect religious liberties, "one of America's most precious possessions", will cheer up conservatives.
Washington is the first stop on the Pope's six-day visit to the United States, which is home to 70 million Catholics.
Mr Obama, who praised the pontiff’s "humility", addressed their shared agenda on climate change.
"Holy Father," he said, "you remind us that we have a sacred obligation to protect our planet - God's magnificent gift to us."
Earlier on Wednesday, Francis stopped by the Vatican Embassy where he gamely joined in selfies with schoolchildren.
In their talks, the Pope and President are expected to try to find common cause on other issues, including income inequality and social justice.
Their views differ on matters such as abortion and same-sex marriage.
His next stop after the White House will be the 450-strong bishops' conference at the Cathedral of St Matthew the Apostle.
Many US bishops have struggled to come to terms with Francis' focus on social justice.
Later on Wednesday, he will canonise a Spanish friar who brought the Catholic faith to California.
On Thursday, Francis will address a joint session of the US Congress.
He will address the United Nations General Assembly on Friday in New York City.
Francis' address to US lawmakers will be closely watched given his history of irking both those on the right and on the left.
He will end his first visit to the US with two days in Philadelphia.
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