That doesn't sit well with Musk, who will likely urge the Trump administration to remain a signatory on the international climate accord. Reps for Musk did not immediately respond to request for comment.
Shortly after Trump won the election, his team began sketching a plan to abandon the the Paris accord, reported Reuters. And Trump's pick to head the EPA, Scott Pruitt, doesn't think climate change science is real.
Musk, on the other hand, has long advocated for the U.S. to institute a gradual carbon tax, which he says is the only viable way to spur a transition from fossil fuels to more sustainable forms of energy.
Trump is unlikely to warm up to the idea of another tax — he's promised to cut taxes across the board.
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Even so, Musk might be able to persuade the president-elect not to renege on the Paris agreement, which already lacks strong mechanisms for enforcement.
Rex Tillerson, Trump's pick for secretary of state and CEO of Exxon Mobil, also supported U.S. participation in the climate talks and endorsed the idea of a national carbon tax. Tillerson may also urge Trump not to leave the Paris deal.
Musk has a financial incentive for wanting the U.S. to start thinking progressively about transitioning from fossil fuel. Musk's company Tesla acquired SolarCity, a leading U.S. firm building solar-powered energy systems, last month.
Trump has previously said that he's convinced climate change is a hoax perpetrated by the Chinese.