NEW LONDON, Conn. — President Obama used a commencement address on Wednesday at the Coast Guard Academy to cast his push for urgent action to combat climate change as a national security imperative, saying that the warming of the planet poses an “immediate risk” to the United States.
The speech was part of an effort by Mr. Obama to make a multipronged case for his ambitious climate-change agenda, which he has identified as a top priority for the remainder of his time in office and as a central element of his legacy. Instead of promoting his plan strictly in environmental terms, he has pitched it as beneficial for the economy, necessary to protect public health and vital to the nation’s security.
“I am here today to say that climate change constitutes a serious threat to global security, an immediate risk to our national security, and, make no mistake, it will impact how our military defends our country,” Mr. Obama told about 4,200 people on an athletic field overlooking the water here, including about 200 graduates in crisp white dress uniforms. “And so we need to act, and we need to act now.”
Mr. Obama repeated arguments he cites often to promote his climate change effort, including a litany of grim facts and figures about rising temperatures, swelling seas and vanishing sea ice, dismissing skeptics of the phenomenon or those who refuse to act on it as guilty of “negligence” and “dereliction of duty.”
“I know there are still some folks back in Washington who refuse to admit that climate change is real, and on a day like today, it’s hard to get too worried about it,” Mr. Obama said on a sunny day cooled by a chilly sea breeze. “The science is indisputable,” he said. “The planet is getting warmer.”
But on Wednesday, he coupled those well-worn arguments with a national security-themed call to action to Coast Guard graduates just minutes before they received their commissions. The president argued that climate change has set off dangerous domino effects around the world, prompting a severe drought in Nigeria that was exploited by the terrorist group Boko Haram, and drought, crop failures and high food prices that “helped fuel the early unrest in Syria” before it descended into civil war.
He told the graduates that their generation would have to invent, build and pioneer the energy-efficient technologies that would be needed to reverse the damaging effects of climate change. He said the Pentagon regarded the planet’s warming as a “threat multiplier.”
“We all know what needs to happen — it’s no secret: The world finally has to start reducing its carbon emissions now,” the president said. “This is a place where we need you.”
In March, Mr. Obama introduced a blueprint for cutting greenhouse gas emissions over the next decade in the United States by up to 28 percent from its level in 2005 levels. The plan, which hinges on new Environmental Protection Agency rules intended to drastically reduce planet-warming carbon dioxide emissions from cars and coal-fired power plants, will be the White House’s formal submission to the United Nations ahead of a summit meeting on climate change in Paris in December.
Mr. Obama faces strong opposition on climate change efforts from many Republicans and coal industry officials, who say the proposal is a vast executive overreach and would devastate the economy. Facing such resistance, the president is working to build support in other ways, including his focus on national defense.
“Denying it or refusing to deal with it endangers our national security. It undermines the readiness of our forces,” Mr. Obama said. “Politicians who say they care about military readiness ought to care about this as well.”
In a report issued on Wednesday, the White House said climate change would act as “an accelerant of instability around the world,” prompting water scarcity and food shortages that could escalate tensions and lead to overpopulation. It also said that rising temperatures would “change the nature of U.S. military missions,” increasing the demand for resources in the Arctic and coastal regions that would be affected by higher sea levels, and result in humanitarian crises that are larger and more frequent.
The president said the conditions could create a global surge of “climate change refugees — and I guarantee the Coast Guard will have to respond.”
Closer to home, Mr. Obama said the effects of climate change were threatening critical infrastructure across the United States, including military posts and training grounds.
“Climate change, especially rising seas, is a threat to our homeland security — our economic infrastructure, and the safety and health of the American people,” Mr. Obama said.
康涅狄格州新伦敦——周三，奥巴马总统利用在海岸警卫队学院(Coast Guard Academy)毕业典礼发表讲话的机会，要求采取紧急行动对抗气候变化，称这是国家安全方面的当务之急，奥巴马表示，全球变暖对美国构成“直接风险”。
今年3月，奥巴马提出了一项计划，即以2005年的排放水平为准，在未来十年将美国的温室气体排放量最多减少28%。白宫将在今年12月巴黎举办气候变化峰会之前，将该计划正式提交给联合国。该计划以美国国家环境保护局(Environmental Protection Agency)的新规定为基础，这些规定旨在大幅减少汽车及燃煤发电站的二氧化碳排放量，而二氧化碳是导致全球变暖的罪魁祸首。