Proposition 68, which was placed on the ballot by the California Legislature, would authorize the sale of $4 billion in bonds to establish and rehabilitate state and local parks and to pay for environmental, water infrastructure and flood protection projects. Opponents raise fair questions about the wisdom of new state borrowing in a year in which the state is running a big surplus. Supporters respond by saying it’s traditional to use bonds to pay for capitol improvements and by emphasizing the bond responds to real needs, starting with its focus on adding parks to neglected poor communities.