Former U.S. President Donald Trump addresses a member of the news media after attending a border security briefing with Texas Governor Greg Abbott to discuss security at the U.S. southern border with Mexico in Weslaco, Texas, U.S. June 30, 2021.

GLASGOW, Nov 9 (Reuters Breakingviews) – Donald Trump did his damnedest to yank America from global efforts to combat climate change. The former president is not actually at COP26, the big UN climate conference in Glasgow, but his presence is palpable. And not just because he owns a Scottish golf club not so far away which played host to Indonesia’s delegation. A potential return to the White House hovers over the deliberations.

As nations sign up to long-term commitments to reduce their carbon emissions, banks pledge their balance sheets to assist and multinationals outdo each other with glossy promises to make their businesses cleaner and greener, many COP26 attendees wonder if Trump will return to the presidency in 2024. Their worry is that he will try to undo many of the things that have been agreed to try to keep the planet from warming up more than 1.5 degrees Celsius over pre-industrial levels.

Those fears are legitimate. For starters, soon after occupying the Oval Office, Trump pulled the United States from the Paris Agreement, reached at a previous COP in 2015. There, signatories agreed to keep the earth from warming by no more than 2 degrees Celsius above pre-industrial levels. He then set about unwinding numerous…

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