President Donald Trump has argued that the Paris agreement, which includes separate emission-reduction targets for each country with a collective goal of keeping global temperature rises down, is unfair to the US and said he would only re-enter on new terms.
Pompeo said: "In global climate discussions, we will continue to offer a realistic and pragmatic model - backed by a record of real world results - showing innovation and open markets lead to greater prosperity, fewer emissions, and more secure sources of energy".
Many critics of the Paris agreement say America is the leader in cutting carbon emissions, but that's not true.
Almost 200 countries signed up to the climate deal, in which each provided its own goals to curb emissions of heat-trapping gases that lead to climate change. Agreement rules prevented a country from pulling out in the first three years after the November 4, 2016, ratification.
Secretary of State Michael Pompeo's announcement Monday of the formal US retreat came on the first day that it was possible for the U.S.to make the move. He submitted formal notice to the United Nations Monday to start the yearlong process of withdrawing from the pact, though in truth, his polices have been actively undercutting it all along.
It aims to keep the global temperature rise of the planet to "well below 1.5-2°C above pre-industrial levels this century". Former vice-president Joe Biden called Trump's decision "shameful".
A report by the U.N. Intergovernmental Panel on Climate Change said past year the world had little over a decade to rapidly reduce emissions from fossil fuels use to keep global temperatures from rising more than 1.5 degrees Celsius (2.7 degrees F).
More than 400 American mayors have signed a pledge to uphold responsibilities outlined in the Paris Agreement at a local level. But he said at 3 or 4 percent growth, which he said he expected was needed, the country would be at "grave risk of brownouts and blackouts, our businesses will come to a halt in many cases". But that may not hold if Trump ends up reelected to a second term, as the European Union readies a carbon tax for imports to punish inaction in other countries and China doubles down on building its clean energy economy.
Since 2005, the United States isn't in the top 10 in percentage of greenhouse gas emission reductions.
But Trump, who took office in 2017, has pledged to turn back environmental regulations as states such as California and NY try to take stronger action on their own.
The USA is the only country to leave the Agreement, which was signed by 197 countries. That means the State Department would still send a delegation to the 25th Conference of Parties scheduled to convene next month, where countries are supposed to work out details of how they will fulfill their promises to reduce their greenhouse gas emissions.
A 2018 survey by the Yale Programme on Climate Change Communication found that 77% of Americans believed the United States should remain in the Paris Agreement, including 60% of Republicans.
Not only is the US the largest historic contributor of atmospheric carbon emissions, it is the country that helped shape the approach that broke the logjam between the developed and developing nations to pave the way for the treaty.