Brown discussed his plans in a telephone interview after U.S. President Donald Trump announced he would withdraw the United States from the landmark 2015 Paris climate accord, a global agreement to fight climate change.
Paris City Hall was symbolically bathed in green light on Thursday night following the American president's announcement. And since it is an "executive agreement", Trump is well within his authority to withdraw from it.
Mitt Romney tweeted, "Affirmation of the #ParisAgreement is not only about the climate: It is also about America remaining the global leader".
Will it affect the US economy?
"We deem the momentum generated in Paris in December 2015 irreversible and we firmly believe that the Paris Agreement can not be renegotiated since it is a vital instrument for our planet, societies and economies", the leaders of the three countries said in a rare joint statement.
In 2016, the US signed the Paris Accord, pledging to reduce its national greenhouse gas emissions by 26 percent to 28 percent below 2005 levels by 2025.
Johnson claims the Paris agreement forces the U.S.to rely on more expensive, alternative energy sources, driving up prices for consumers.
Under the deal, the United States had agreed to cut greenhouse gas emissions as much as 28 percent below 2005 levels by 2025.
A formal withdrawal would take years, experts say, a situation that led the president of the European Commission to speak dismissively of Trump on Wednesday. That's according to a White House official, congressional officials and others briefed by the White House.
Of the 197 parties to the United Nations Framework Convention on Climate Change, 195 signed the Paris agreement.
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Muguruza has endured a hard 2017 and again found herself in trouble after falling a set and a break behind against the Estonian. In the victory, Basilashvili won 74 percent of his first serve points and 50 percent of his second serve points.
Mr Trump's announcement was met with applause from the crowd of supporters gathered in the Rose Garden. That means it could take another three-and-half years for the U.S.to formally withdraw, though Trump promised to stop implementation immediately.
Fox, who has clashed with Trump since last year's presidential campaign, said the American leader's decision "condemns this generation and those to come" and would leave "a dark legacy just to satisfy your greediness".
"We're getting out", Trump said at a ceremony in the White House Rose Garden in which he decried the Paris accord's "draconian" financial and economic burdens. "At what point do they start laughing at us as a country?"
"The Paris Agreement allows each party to forge its own path to contributing to the goals of preventing risky climate change". It requires countries to set and meet targets for reducing greenhouse gas emissions, based on each nation's current level of production.
Mr Mackenzie, whose $119 billion Melbourne-based company has several shale oil and gas plants in the USA, said Australia and other countries should stay in the accord even if the world's second largest carbon emitter withdrew because that was "better than nothing". That process will proceed despite this foolish decision by the Trump administration, and I hope states around the country join Virginia in showing Washington the way forward on this critical issue for our nation and our world.
Earlier this month, Murphy helped introduce a resolution stating that the United States should work in cooperation with the worldwide community and continue to exercise global leadership to address the causes and effects of climate change.
United States withdrawing from it is certainly bad news as the country is the second largest emitter of greenhouse gases.
White House aides have been divided on the question of staying or leaving the accord and had been deliberating on "caveats in the language" as late as Wednesday, one official said.
Top Senate Republicans wrote to Trump last week urging him to make a "clean break" from the Paris climate accord.