From the Miami Herald:

Letting some fish species die off as part of a larger environmental restoration may be the best way to protect the Sacramento-San Joaquin Delta, a leading California think tank says.

The recommendation in a 500-page report by experts working with the Public Policy Institute of California, is the second time this month that an influential report has suggested some fish, particularly Delta smelt, may become too far gone to save. The other was an early draft from a new state agency charged with crafting a plan for the Delta.

In short, experts assembled by the Public Policy Institute of California say it is time for a number of sweeping changes.

"California has essentially run out of cheap new water sources," said Ellen Hanak, an agricultural economist and senior fellow at the PPIC.

For more, see: Delta's survival more important than saving some fish species, researchers say