The grid is not enough.
As he signed the most ambitious clean electricity law the world has ever seen last week, California Gov. Jerry Brown upped the ante by adding a creation of his own: He signed an executive order calling for the state to achieve carbon neutrality by 2045.
That order builds on earlier legislation that requires the state to reduce greenhouse gas emissions to 80 percent below 1990 levels by 2050.
It’s a sign of the times that removing all carbon emissions from the electrical grid of the most prosperous state in the...