(Bloomberg) -- As Ronald Reagan’s secretary of state, George Shultz faced off against Muammar Qaddafi, the Soviet Union and Chinese communists.

His latest cause, though, is one few fellow Republicans support: fighting climate change.

Two years ago, Shultz was alarmed when a retired Navy admiral showed him a video of vanishing Arctic sea ice and explained the implications for global stability. Now, the former Cold Warrior drives an electric car, sports solar panels on his California roof and argues for government action against global warming at clean-energy conferences.

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