Thousands of mayors, climate activists and business leaders from around the world descended Thursday on San Francisco to cheer on efforts to reduce global warming, even after U.S. President Donald J. Trump signaled his disdain for the issue.
The Global Climate Action Summit, organized by California Gov. Jerry Brown, included a report that 27 major cities around the world have seen emissions decrease over a five-year period and are now at least 10 percent lower than their peak.
The cities include Berlin, London, Los Angeles, New York, Paris and San Francisco. Together the cities include about 54 million people.
The star-studded conference included a rousing call to...