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Celine Bak of Canada's Centre for International Governance Innovation hailed the wording as "a clear victory for the G20, which knew how to formulate a statement that could allow President Trump to re-integrate into the Paris accord."
She is not alone in hoping Washington could be brought back into the fold.
French President Emmanuel Macron said he "never gives up hope on convincing" Trump to change his mind on the Paris deal, while British Prime Minister Theresa May also said she believed such a return was possible.
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