This led into a video, directed by James Cameron (who has directed Weaver multiple films), which Weaver narrated.
California Gov. Jerry Brown addressed the crowd after the video. He said climate change is a danger and there is a moral imperative to take action and most scientists agree.
Brown blasted Donald Trump for his speech last week, which was 76 minutes long and about dire threats, but never mentioned climate change.
"It's not surprising Trump picked a VP who doesn't believe in evolution. The parties couldn't be more different." He said the GOP was worse than the Know-Nothings in the 1850s.
Brown credited Clinton for working on the European accord on combating climate change. He said Clinton would lead a revolution on energy.
"Our (California) economy is growing faster than any nation in the world." He said you can grow the economy and clean the environment at the same time.
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