The United States has begun the formal process of withdrawing from the 2015 Paris climate agreement.
"President (Donald) Trump made the decision to withdraw from the Paris Agreement because of the unfair economic burden imposed on American workers, businesses, and taxpayers," US Secretary of State Mike Pompeo said.
"The US is proud of our record as a world leader in reducing all emissions, fostering resilience, growing our economy, and ensuring energy for our citizens. Ours is a realistic and pragmatic model."
Once it exits, the US will become the only country outside the accord.
The European Union, however, expressed disappointment at the move. Krista Mikkonen, minister of environment for current European Council president Finland, said it would mean "the rest of us must further increase our cooperation".
The notification sent to the UN of their intention to leave begins a one-year process that will be completed one day after the 2020 US presidential election.
The US military has launched strikes on Iran after it struck a container ship on Sunday, while Tehran said it had closed the Strait of Hormuz again and some Gulf states announced they are under attack.
Qatar's Ministry of Interior has announced that three people have sustained injuries as a result of falling debris from interception operations against Iranian missiles and drones on Sunday.
At least two children have been killed after a ferry carrying more than 35 people collided with a bridge while crossing the Euphrates River in the eastern Syrian city of Deir al-Zor on Sunday, the Syrian Civil Defence said.
US Senator Lindsey Graham, a key Republican who went from a vocal critic of Donald Trump to one of his most loyal allies on Capitol Hill after Trump became president, has died at age 71.