In summary

It’s a wrap; Gov. Jerry Brown heads home after warning the world about climate change.

Like two low-emission diesel ships passing in the hallways of sustainably constructed meeting halls, the leaders of the U.S. delegation are arriving at the U.N. climate conference in Bonn just as the California delegation is leaving.

Gov. Jerry Brown made his last speech and stood still, reluctantly, for a few final photos today before departing for home in the afternoon.

About the same time, the U.S. State Department announced that Ambassador Thomas A. Shannon—the Under Secretary for Political Affairs who was to head the U.S delegation—had a family emergency and would not attend.

He is being replaced by Judith Garber, Acting Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs.

Although the conference has been under way for a week and a half, the high-level negotiations are just beginning.

It is unlikely that Garber and Brown would have met, even if they had been here at the same time. The first wave of U.S. officials to arrive hosted a breakfast last week. Asked if he planned to attend, Brown said he had another commitment.

The two delegations have at least one thing in common: Both Brown and U.S. officials have had events disrupted by protesters.

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Julie Cart joined CalMatters as a projects and environment reporter in 2016 after a long career at the Los Angeles Times, where she held many positions: sportswriter, national correspondent and environment...