Story by the Associated Press; curated by Dave Urbanski

JAKARTA, Indonesia (AP) — U.S. Secretary of State John Kerry on Sunday called climate change perhaps the world’s “most fearsome” destructive weapon and mocked those who deny its existence or question its causes, comparing them to people who insist the Earth is flat.

“In a sense, climate change can now be considered the world’s largest weapon of mass destruction, perhaps even, the world’s most fearsome weapon of mass destruction,” Kerry told Indonesian students, civic leaders and government officials.

John Kerry: Climate Change May Be Worlds Most Fearsome Weapon of Mass Destruction, Global Warming Skeptics Burying Their Heads in the Sand

Secretary of State John Kerry pauses as he delivers a speech on climate change on Sunday, Feb. 16, 2014, in Jakarta, Indonesia. Climate change may be the world’s “most fearsome” weapon of mass destruction and urgent global action is needed to combat it, Kerry said on Sunday. (Image source:AP/Evan Vucci, Pool)

Kerry also tore into climate change skeptics, accusing them of using shoddy science and scientists to delay reducing emissions of greenhouse gases at the risk of imperiling the planet.

“The science is unequivocal, and those who refuse to believe it are simply burying their heads in the sand,” Kerry said. “We don’t have time for a meeting anywhere of the Flat Earth Society.”

A day earlier, the U.S. and China announced an agreement to cooperate more closely on combating climate change. American officials hope that will help encourage others, including developing countries like Indonesia and India, to follow suit.

China and the United States are the biggest sources of emissions of carbon dioxide and other gases that cause the atmosphere to trap solar heat and alter the climate. Scientists say such changes are leading to drought, wildfires, rising sea levels, melting polar ice, plant and animal extinctions and other extreme conditions.

Also in the Jakarta speech, Kerry said everyone and every country must take responsibility for the problem and act immediately.

“We should not allow a tiny minority of shoddy scientists and science and extreme ideologues to compete with scientific facts,” Kerry told the audience at a U.S. Embassy-run American Center in a shopping mall.

“Nor should we allow any room for those who think that the costs associated with doing the right thing outweigh the benefits.”

Kerry said the cost of inaction will far outweigh the significant expense of reducing greenhouse gas emissions that trap solar heat in the atmosphere and contribute to the Earth’s rising temperatures.

He outlined a litany of recent weather disasters, particularly flooding and typhoons in Asia, and their impact on commerce, agriculture, fishing and daily living conditions for billions of people.

“This city, this country, this region, is really on the front lines of climate change,” Kerry said. “It’s not an exaggeration to say that your entire way of life here is at risk.”

The solution, Kerry said, is a new global energy policy that shifts reliance from fossil fuels to cleaner technologies. He noted the President Barack Obama is championing such a shift and encouraged others to appeal to their leaders to join.

Kerry was in Indonesia on the last leg of a three-nation tour of Asia that started in South Korea. After leaving Indonesia on Monday, he planned to visit Abu Dhabi in the United Arab Emirates.

Before the climate change speech, Kerry toured Jakarta’s Istiqlal Mosque, one of the largest in the world, to pay his respects to Indonesia’s Muslim majority population.

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