President Biden warned military servicemembers Wednesday that top Pentagon officials consider climate change to be the "greatest threat" to America’s national security in the coming years.

"When I went over to the tank in the Pentagon when I was first was elected vice president with President Obama, the military sat us down and let us know what the greatest threats facing America were, the greatest physical threats," he said.

The president said he would speak to key European allies about a unified approach to combating climate change, which he has identified as a priority for his administration.

"We must all commit to an ambitious climate action if we’re going to prevent the worst impacts of climate change, limiting global warming to no more than 1.5 degrees Celsius and lead the global transition in clean energy technology," Biden said.

Biden has suggested that climate change poses a threat to U.S

At the time, Biden said global warming was "already costing us billions in impacts on our bases and our national security."