|Pope Francis in motor cage.|
Pope Francis has called for further action on climate change saying that it was "a critical moment of history", on the first day of his visitto the US.
Speaking to a crowd of more than 11,000 people on the White House South Lawn, the pontiff said the problem could "no longer be left to a future generation".
President Barack Obama said the Pope reminded people "that we have a sacred obligation to protect our planet".
The Pope also praised the response of US bishops to the sex abuse crisis.
He told those gathered at St Matthew's Cathedral that the US church leaders had brought a "generous commitment to bring healing to victims", but said the church officials must work to ensure the abuse will not happen again.
Earlier, making a rare speech in English to thousands at the White House, Pope Francis praised President Obama for recent proposals aimed at tackling air pollution.
Time remains to make the changes required, the Pope said, in a speech that also called for protecting religious liberty and stamping out discrimination.