Updated June 01, 2017 11:04:42

Photo: Elon Musk has advised Donald Trump to remain in the Paris climate accord. (Reuters)

Tesla boss Elon Musk has threatened to leave Donald Trump's advisory board if the United States drops out of the Paris climate deal, amid reports the President is set to go through with his campaign promise to withdraw.

Earlier, Mr Trump said he would make his decision on the accord "very soon", with local media reporting he was set to pull the US from the global pact.

In 2015, 195 nations, including the US and Australia, approved a historic pact to roll back global warming and show up defence against its impacts.

Mr Musk, who has been in Sydney this week with his family, said on Twitter he had done all he could to advise Mr Trump to keep the US in the deal.

Asked what would he would do if Mr Trump withdrew, Mr Musk said he would "have no choice but to depart councils".

Mr Musk, a member of the President's tech and business advisory councils, is a sustainable energy entrepreneur who in March pledged to fix South Australia's power issues following a massive statewide blackout, declaring Tesla could get the job done in a mere 100 days.

Responding to questions from reporters in the Oval Office, Mr Trump said he had been hearing from people on both sides of the Paris issue, but declined to indicate whether he had made up his mind.

"I'm hearing from a lot of people, both ways. Both ways," Mr Trump said.

The President also tweeted: "I will be announcing my decision on the Paris Accord over the next few days. MAKE AMERICA GREAT AGAIN!"

What did countries say they would do under the terms of the Paris climate accord, and how will it be funded?

The tweet came after news reports quoted sources saying Mr Trump had decided to follow through on his campaign pledge to withdraw the US from the deal.

Mr Trump vowed during his campaign to "cancel" the Paris deal within 100 days of becoming president, as part of an effort to bolster US oil and coal industries.

That promise helped rally supporters sharing his scepticism of global efforts to police US carbon emissions.

After taking office, however, Mr Trump faced pressure to stay in the deal from investors, international powers and business leaders, including some in the coal industry.

ABC/Wires

Topics: climate-change, environmentally-sustainable-business, alternative-energy, energy, world-politics, united-states

First posted June 01, 2017 10:58:03