Former Mass. Gov. Mitt Romney, who’s contemplating another White House run, said climate change was real, that humans helped it along and that it was the responsibility of the world to turn back the environmental tide.

“I’m one of those Republicans who thinks we are getting warmer and that we contribute to that,” he said during a Wednesday night speech at an investment management conference, The Associated Press reported.

He didn’t mention his possible presidential run during the address to 3,000. But he spent the half-hour, question-answer session to criticize the federal debt level and to speak of the need for the current White House to address issues that are normally seen as more Democratic in nature — education, poverty and climate change, AP said.

This isn’t the first time Mr. Romney has spoken about his beliefs on climate change.

Mr. Romney wrote in his 2010 book that “human activity is a contributing factor” to climate change, though he did question just how much humans were furthering the environmental degradation, the AP said. And in 2012, he also said that the United States shouldn’t spend a lot of money to fight climate change.

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