California Gov. Jerry Brown has made renewable energy and climate change a centerpiece of his final term, which ends in January. This week, he co-hosts the “Global Climate Action Summit”in San Francisco. Thousands of scientists, political leaders, business representatives and celebrities from around the globe are arriving all week for the event, which is designed to continue momentum at local levels — despite indifference from the Trump administration — to expand renewable energy and reduce emissions of greenhouse gases that scientists say are warming the planet and leading to more wildfires, heat waves, droughts, floods and other problems. Brown discussed the issues in an interview with Paul Rogers, resources and environment writer for the Bay Area News Group.