Donald Trump is sowing doubt over the Paris climate change pact as his hostility towards the deal and the growing swagger of his campaign focus attention on how he could undermine it as president.
The Republican candidate last week vowed to “cancel” the painstakingly negotiated agreement, a threat experts said was unrealistic. But his comments put a spotlight on its slow ratification and weak spots in President Barack Obama’s climate legacy.
While Mr Trump could not single-handedly scrap the agreement — which Washington and Beijing had rallied more than 190 countries to join — he could withdraw the US, the second largest greenhouse gas emitter after China, or block the action needed to cut emissions to the levels promised by Mr Obama.
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