NEW YORK - Mayor Bill de Blasio says President Donald Trump's decision to pull out of the Paris Accord is a direct threat to the city.

During his weekly radio show Friday on WNYC, the mayor said the city will honor the accord, adding that it is now up to local governments to shoulder the burden of addressing climate change.  

"This is a threat to New York City directly. What President Trump, a New Yorker of all things, what he did is a dagger aimed at the heart of New York City because we're a coastal city. We already experienced Sandy. If climate change worsens, New York City will be hurt. So we have to take disproportionate action for our own good," 

The city has already committed to cutting greenhouse gas emissions by 80 percent by 2050. 

The mayor says he plans on signing an executive order to bolster those efforts.

Trump announced Thursday that he wants to hold further discussions with other countries to "level the playing field" when it comes to carbon emissions standards.

In a joint statement, leaders from France, Germany, and Italy responded to say the deal cannot be renegotiated.

Trump says current restrictions are costing the U.S. trillions and slashing manufacturing jobs.

"As someone who cares deeply about the environment, which I do, I cannot in good conscience support a deal that punishes the United States which is what it does," said Trump. "We will start to negotiate and we will see if we can make a deal that is fair, and if we can that's great and if we can't that's fine."

It takes two years before the U.S. can actually start the process of formally dumping the Paris Accord.

But when that happens, the United States will be one of just three countries not on the Paris Accord, the other two being Nicaragua and Syria.

Trump insists the U.S. will remain the world leader on environmental issues.

The decision has also led to some high-profile resignations from Trump's advisory councils, including Tesla founder Elon Musk and Disney Chairman Bob Iger.

Staten Island residents, meantime, are reacting to Trump’s decision to withdraw from the climate deal. 

The borough voted overwhelmingly for Trump last year, and Staten Island’s shoreline was severely damaged by Hurricane Sandy back in 2012.

Some people disagree with the move, while others say they still have faith in Trump.

"Listening to his whole speech, he did say he was going to renegotiate. So I have faith in him," said one Staten Island resident.

"I just think security is a bigger thing right now. I'm sure private industry will take care of all the green stuff," said another resident.

"I'm really, really upset he pulled out. Because what we do in America affects everybody,"  added a third Staten Island resident.

Meanwhile, state officials announced additional funding to build a new seawall on the borough’s eastern coast to protect against future flooding.

It will be 20-feet high and seven miles long, and would also feature a boardwalk.

A day after pulling out of the Paris Climate accord, questions swirled whether Trump believes global warming at the hands of humans is a hoax.

During a press briefing Friday, EPA Administrator Scott Pruitt and White House Press Secretary Sean Spicer did not address Trump's beliefs on climate change, instead supporting his choice to leave the Paris Climate Agreement.

"People have called me a climate skeptic or a climate denier," Pruitt said at the White House. "I don't even know what it means to deny the climate. I would say there are climate exaggerators."

"There were other sectors that were very concerned about the implementation of it, and frankly I think there were some companies on some organizations that are among those you mentioned that, while they maybe wanted to stay in, also expressed concerns about the target levels," Spicer said.

Trump famously called climate change a hoax that was cooked up by the Chinese to improve their trade advantage.