Mr Macron – who has not always seen eye to eye with Mr Trump since being elected France’s leader in 2017 – was speaking as Democrat President-Elect Mr Biden opened up a lead over his Republican opponent of more than five million votes and rising. Mr Trump has so far refused to accept defeat in the election and has levelled a series of unproven allegations over voter fraud.
Nevertheless, Mr Macron, along with UK Prime Minister Boris Johnson, Germany’s Chancellor Angela Merkel and numerous other world leaders, have already offered their congratulations to Mr Biden.
In contrast to Mr Trump, who questioned climate science and withdrew the United States from the 2015 Paris Agreement on climate change, Mr Biden has pledged to rejoin the pact and to invest $2 trillion to wean the country off planet-warming fossil fuels.
Mr Macron said having the United States rejoin the pact, after officially exiting on November 4, would vindicate faith in the agreement aimed at preventing catastrophic climate change and signed by nearly 200 countries.
Mr Macron, speaking on Thursday during an online summit hosted by the French government, declared: “It is proof that we had to stand firm against all the headwinds.”
Paraphrasing Mr Trump’s own famous campaign slogan, he added: “‘Make our planet great again’ is a possibility, not just in words but also in deed.”
“Make America Great Again” was a Donald Trump election slogan.
However, he may face constraints on his ability to pass ambitious climate policies if the Republican Party remains in control of the Senate, with all eyes on the US state of Georgia, and two special run-off elections scheduled for January.
European leaders hope a Biden administration focus on climate change will encourage other countries to pledge deeper emissions cuts ahead of a UN climate conference in Glasgow in November 2021.
Mr Johnson, whose government is hosting the gathering, discussed climate change in a post-election call with Biden and invited him to attend.
Japanese Prime Minister Yoshihide Suga said he and Biden had “agreed that Japan and the US would work closely together to resolve pressing global issues such as the novel coronavirus and climate change”.
Chinese President Xi Jinping in September pledged that his country would become carbon neutral by 2060, although Beijing has made no official comment since the US election.
Mr Trump has kept up a steady stream of tweets since major US networks called the race in Mr Biden’s favour on Saturday.
A manual recount is underway in Georgia, but given Mr Biden’s lead of 14,000 votes, it would take an extraordinary reversal to flip to state back to Mr Trump.
Even then, he would need courts to rule in his favour in several other states including Pennsylvania.
Mr Trump’s three oldest children are believed to be split on the issue, with sons Eric and Donald Jr urging him to fight on, while daughter Ivanka is thought to be looking for him to find a way to save face, CNN has reported.
Nevertheless, he shows little inclination towards backing down currently, and his decision to fire several key staff including defence secretary Mark Esper has alarmed many in Washington.