IT'S NOT just Donald Trump. The United States has a long record of negotiating international agreements and then running away from them. The rest of the world has an equally long record of heaving a sigh of regret, telling the Americans it will be happy to have them back when
Gwynne Dyer: US defaults as world tries to survive
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Gwynne Dyer
"We need the Paris agreement to protect all of creation," said Germany's Chancellor Angela Merkel.

Then she, President Emmanuel Macron of France and Prime Minister Paolo Gentiloni of Italy issued a joint statement saying: "We firmly believe that the Paris agreement cannot be renegotiated since it is a vital instrument for our planet, societies and economies."
"As far as the Paris accord is concerned ... our government is committed, irrespective of the stand of anyone, anywhere in the world," said Japan's Finance Minister, Taro Aso.
And China's President Xi Jinping modestly explained that his country has only become the world's leader on climate change by default.
"It's because the original front-runners suddenly fell back and pushed China to the front."
The absence of the US Government will not derail the project. The commitments of American states, cities, organisations and individuals on reducing US greenhouse gas emissions will continue to provide at least half of the cuts promised by ex-president Barack Obama. Since those promised cuts were to be spread over 10 years, the damage may be even less if Trump turns out to be a one-term president.
The commitments made at Paris in 2015 were voluntary national promises. There were no negotiations about how big the the contributions of various countries should actually be: Trump only talks about "renegotiating" the deal because he never actually read it.
The sad fact is that all the cuts promised by all the countries at the Paris conference were not enough to keep global warming from going past the never-exceed level of plus 2C. When the United Nations added the numbers up, the world was still heading for plus 2.7C.
Take all the promised American cuts out of the equation and the world will be heading for around plus 3C instead, but it doesn't make a huge difference. Either way, we cross the threshold and tumble into irreversible warming.
However, the world still has 20 years or so before we pass through plus 2C. Everybody at the Paris talks understood that they would have to hold another conference in about five years' time and come up with bigger cuts. It's salami tactics -- bad science but good politics -- and it could still deliver the goods.
By five years from now, Trump may no longer be a problem. Even if he's not impeached or dead, he might lose the 2020 election. He might even choose not to run again; he's already complaining about how hard the job is.
So the US might rejoin the rest of the world in 2020 -- or it might not, but the rest of the world still has to go on trying to save itself even if the US chooses to be a free rider.
Gwynne Dyer is an independent journalist whose articles are published in 45 countries.