Last week, Governor Jerry Brown turned up on public radio's Science Friday program, urging scientists to stand up and be heard on the impacts of climate change and other "existential threats," from mass extinction of species to nuclear war.
"Catastrophe -- it does loom," said Brown, calling on scientists to, "speak the truth as they know it and thereby combat the error and the falsity that is spreading like a cancerous plague."
This week, more than 2,300 faculty members from Caltech, the University of California and Cal State University systems responded by sending an open letter to President Donald Trump, imploring him to rethink his position on climate change.
The letter, written by Berkeley astronomer Aaron Parsons, urged Trump and his administration "in the most urgent terms possible" to stand by the international climate agreement signed in Paris by the U.S. (under President Barack Obama) and nearly 200 other nations. Trump has threatened to "tear up" the agreement, while on other occasions saying he has an "open mind" on the matter.
The letter, to which signatures are still being added electronically, warns that the rapidly warming globe will lead to "catastrophic, unstoppable consequences," if "bold and decisive action" isn't taken to reduce burning of fossil fuels. Trump has aggressively promoted fossil fuels, with his words and appointments .