The Supreme Court ’s surprise decision Tuesday to halt President Obama’s climate change regulation could weaken or even imperil the international global warming accord reached with great ceremony in Paris less than two months ago, climate diplomats said. The Paris Agreement , the first accord to commit every country to combating climate change, had as a cornerstone Mr. Obama’s assurance that the United States would carry out strong, legally sound policies to significantly cut carbon emissions. Over history, the United States is the largest greenhouse gas polluter, although its annual emissions have been overtaken by China’s. But in the capitals of India and China, two of the world’s largest polluters, climate change policy experts said the Supreme Court decision threw the American commitment into question, and possibly New Delhi’s and Beijing’s, too. […]