Kerry, who has framed global warming as a centerpiece of his diplomatic agenda, kicked off a tour in Jakarta, Indonesia devoted to climate change.
"We should not allow a tiny minority of shoddy scientists and science and extreme ideologues to compete with scientific facts," Kerry told students at the U.S. Embassy-run American Center. "Nor should we allow any room for those who think that the costs associated with doing the right thing outweigh the benefits."
"The science is unequivocal, and those who refuse to believe it are simply burying their heads in the sand," he added. "We don't have time for a meeting anywhere of the Flat Earth Society.”
Obama also trumpeted new Environmental Protection Agency regulations that would force power plants to cut down on their carbon emissions, controversial rules that will lead to a flurry of court challenges in coming months and years.
And Kerry on Sunday framed increasingly volatile weather as an issue of national security.
"In a sense, climate change can now be considered the world's largest weapon of mass destruction,” he insisted, “perhaps even, the world's most fearsome weapon of mass destruction."