How climate change, nuclear war occupy a former California governer in retirement

Brown walking past one of the two solar panels that provides the power to his home near Williams, California, the United States. Photos: Rich Pedroncelli/AP

Former California governor Jerry Brown is living off the grid in retirement, but he's still deeply connected to two issues that captivated him while in office and now are centre stage globally: climate change and the threat of nuclear war.

The 83-year-old Brown, who left office in 2019, serves as executive chairman of the Bulletin of the Atomic Scientists, which sets the Doomsday Clock measuring how close humanity is to self-destruction. He's also on the board of the Nuclear Threat Initiative.