Global summit rebukes Trump, cheers on climate aid

San Francisco — 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 action by Harrison Ford, who implored the audience to protect forests, fisheries and other natural wonders. Former President Barack Obama, under whose watch the U.S. agreed to the landmark Paris climate accord, made a brief appearance by video.

The goal of the conference is to showcase actions already being taken to prevent climate change and to “inspire deeper commitments” among attendees. It was unclear what specific actions might be taken before the summit ends today.

“Doing nothing is not an option. Going green is a must. Cities all over the world are on the front lines of climate change,” said Frank Jensen, lord mayor of Copenhagen, adding that the bicycle-friendly city wants even more bike lanes.

Giuseppe Sala, the mayor of Milan, Italy, talked up plans to reduce waste from food and other sources.

“I’m very, very proud of waste management. I know it is not a sexy issue, but we commit to a future without waste,” he said.

“Doing nothing is not an option. Going green is a must. Cities all over the world are on the front lines of climate change.” FRANK JENSEN, LORD MAYOR OF COPENHAGEN